Question

　　Until recently, a smudge pot with heavy oil burning in it has been one of the few weapons a farmer could use to save his crops from frost． A canopy over plants also reduces heat loss, but canopies can't cover fields． Some farmers use smoke screens, but they make the leaves sooty and the smoke usually wafts onto the next farm． Large rotating fans above trees are used in orchards． The idea behind the fans is to create turbulence so that the frosty air cannot settle near the ground．

　　Now, researchers in Canada have made a product that looks stranger than any of these, but it works． When frost is forecast, a farmer jumps on his tractor and zips up and down his rows of strawberries, tomatoes, tobacco, or small fruit trees, spraying a protein foam that is up to four feet wide and three inches thick． The foam is so soft and light that not a stem or leaf is damaged． The air trapped in the bubbles insulates plants against the cold． In about eighteen hours the foam breaks down and scatters．

1．The author obviously considers the best frost -fighting weapon to be the_____．

A．smudge pot B． protein foam C． canopy D． smoke screen

2．Smudge pots burn______．

A． light oil B． heavy oil C． crude oil D．refined oil

3．Smudge pots attempt to prevent frost by creating______．

A．turbulent air B． still air C． warm air D． cold air

4．Whatever their size, canopies are probably______．

A．difficult to erect　　B．cumbersome to take down

C．a storage problem D．All of the above

5．Protein foam sounds as if its consistency resembles______．

A． milk B． whipped cream C． butter D． cheese

6．Implied but not stated:

A．Protein foam protects against frost for about eighteen hours．

B．Protein foam covers the plants to a depth of four inches．

C．Protein foam is white．

D．Protein foam is soft and light．

7．Protectors against frost operate by______．

A．dispersing cold air from plants　　B．maintaining warm air around plants

C．Either A or B　　　　D．Neither A nor B

8．None of the methods for protecting crops would be effective if the farmer did not_____．

A．possess a tractor B．pay attention to the weather

C．Both A and B　　 D．Neither A nor B

Answer 1

答案：B;B;C;D;B;A;C;B
解析：

此处的关键词汇是frost，借助上下文，尤其是heat的反衬词义和cold的相近词义，便可以猜测到frost的含义。

提示：

话题：“农作物防冻新药”语篇的阅读技巧。重点：细节捕捉，猜测生词。