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11 tháng 3 2018

Kiến thức: Rút gọn mệnh đề

Giải thích:

Khi hai mệnh đề có cùng chủ ngữ, có thể rút gọn bằng cách: lược bỏ chủ ngữ, đồng thời dùng:

– Cụm V.ing nếu chủ động

– Cụm V.p.p nếu bị động

Trong trường hợp nhấn mạnh hành động chủ động, xảy ra trước hành động còn lại, dùng cụm “Having V.p.p”.

Câu A sai: Because of + the fact that S V

Câu B sai do vừa dùng “Because” vừa dùng “so”.

Câu C sai do dùng cụm V.ing.

Tạm dịch: Sống gần một nhà máy hóa chất trong nhiều năm, một số dân làng hiện đã bị ung thư.

Chọn D

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.Water scarcity is fast becoming one of the major limiting factors in world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient...
Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.

Water scarcity is fast becoming one of the major limiting factors in world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.

Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilage which give them water-retaining properties. Another chemical mechanism is that of the epicuticular wax layer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from external aggression, which can come from inorganic agents such as gases, or organic agents which include bacteria and plant pests.

Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert plants. If successfully developed, such a compound could be used to greatly increase a plant's ability to maintain health in such adverse situations as inadequate water supply, limited fertilizer availability, attack by pests, and poor storage after harvesting

This passage deals mainly with ________

A. decreasing water supply

B. desertification

C. factors limiting crop productionD. developing efficient plants

D. developing efficient plants

1
5 tháng 5 2017

Đáp án D
Toàn bài nói về việc mùa màng càng bị kém hiệu quả do thiếu nước nhưng đã tìm ra những loại cây chịu
hạn thay thế để sản xuất ra những vụ mùa tốt hơn. Từ việc nêu ra các đặc điểm chịu hạn của chúng tác giả
kết luận những loại cây thay thế này đang được nghiên cứu phát triển

28 tháng 4 2019

Đáp án D

“Anh ấy đã học trong nhiêu năm. Anh ấy lẽ ra đâ nên nhận ra sớm hơn rằng ngữ pháp của bản thân mình không đúng.”

Cấu trúc:

- Should have Vpp/ed: lẽ ra đã nên làm gì (nhưng sự thật đã không làm)

- No sooner....than....: Vừa mới/Ngay khi...thì...

A, C sai nghĩa của câu

A. Anh ấy đã học trong nhiều năm để nhận ra sớm rằng ngữ pháp của mình không đúng.

C. Ngay khi anh ấy học trong nhiều năm thì anh ấy lẽ ra đã nên nhận ra rằng ngữ pháp của mình không đúng.

B. sai ngữ pháp

ð Đáp án D (Mặc dù anh ấy đã học trong nhiều năm nhưng anh ấy đã không nhận ra sớm hơn rằng ngữ pháp của mình không đúng.)

23 tháng 8 2018

Chọn D

plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums...
Đọc tiếp

plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.

Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilage which give them water-retaining properties. Another chemical mechanism is that of the epicuticular wax layer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from external aggression, which can come from inorganic agents such as gases, or organic agents which include bacteria and plant pests.

Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert plants. If successfully developed, such a compound could be used to greatly increase a plant's ability to maintain health in such adverse situations as inadequate water supply, limited fertilizer availability, attack by pests, and poor storage after harvesting

All of the following are examples of an adverse situation for crops EXCEPT________

A. pest aggression

B. inadequate water

C. insufficient fertilize

D. proper storage 

1
4 tháng 2 2018

Đáp án D
Suy ra từ câu cuối : such adverse situations as inadequate water supply, limited fertilizer availability, attack by pests, and poor storage after harvesting.

plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums...
Đọc tiếp

plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.

Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilage which give them water-retaining properties. Another chemical mechanism is that of the epicuticular wax layer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from external aggression, which can come from inorganic agents such as gases, or organic agents which include bacteria and plant pests.

Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert plants. If successfully developed, such a compound could be used to greatly increase a plant's ability to maintain health in such adverse situations as inadequate water supply, limited fertilizer availability, attack by pests, and poor storage after harvesting

Which of the following is a mechanical or physical mechanism that desert plants use?

A. The plant’s shape

B. The vast leaf size

C. The small root system

D. The high water system

1
16 tháng 11 2017

Đáp án A
Đ2: Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. (bao gồm: bóng cây, lá nhỏ, và bộ rễ lớn)

3 tháng 2 2019

Đáp án B

Con người đã phá hủy môi trường trong một thời gian dài. Họ hiện đang trả giá cao cho việc này.

A. Bởi vì đã phá hủy môi trường trong một thời gian dài, con người hiện đang phải trả giá cao cho việc này.

B. Đã phá hủy môi trường trong một thời gian dài, con người hiện đang phải trả giá cao cho việc này.

C. Khi phá hủy môi trường trong một thời gian dài, họ đang phải trả giá cao cho việc này.

D. Sau khi bị phá hủy trong một thời gian dài, môi trường hiện đang phải trả giá cao.

12 tháng 10 2018

Đáp án B

Kiến thức: liên từ, rút gọn mệnh đề, giới từ

Giải thích: 

Rút gọn mệnh đề: Having + Vpp => diễn tả hành động đã hoàn thành trước một hành động khác.

Because + clause: bởi vì => A sai

On + V.ing: khi => C sai

Câu D sai về nghĩa.

Tạm dịch : Đã phá huỷ môi trường trong một thời gian dài, con người hiện đang phải trả giá đắt cho việc này.

13 tháng 9 2018

B

Rút gọn mệnh đề: Having + Vpp => diễn tả hành động đã hoàn thành trước một hành động khác.

Because + clause: bởi vì => A sai

On + V.ing: khi => C sai

Câu D sai về nghĩa.

Tạm dịch : Đã phá huỷ môi trường trong một thời gian dài, con người hiện đang phải trả giá đắt cho việc này.=> Đáp án B

plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums...
Đọc tiếp

plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.

Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilage which give them water-retaining properties. Another chemical mechanism is that of the epicuticular wax layer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from external aggression, which can come from inorganic agents such as gases, or organic agents which include bacteria and plant pests.

Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert plants. If successfully developed, such a compound could be used to greatly increase a plant's ability to maintain health in such adverse situations as inadequate water supply, limited fertilizer availability, attack by pests, and poor storage after harvesting

Which is one of the ways in which the epicuticular wax protects the plant?

A. It helps the plant to attack aggressors

B. It guards against bacteria

C. It releases gases against plant pests

D. It helps the plant to avoid excessive moisture intake

1
24 tháng 4 2018

Đáp án B
Đ2: It also protects the plant from external aggression, which can come from inorganic agents such as gases, or organic agents which include bacteria and plant pests. Nó (the epicuticular wax) cũng bảo vệ cây cối khỏi những tấn công bên ngoài, cái mà đến từ những tác
nhân vô cơ như là các loại khí, hoặc những tác nhân hữu cơ bao gồm vi khuẩn và côn trùng cây