[单项选择]Without heat and sunlight, plants on the earth ______ well.
A. would not grow
B. will not grow
C. had not grown
D. would not be grown

[单项选择]Without heat and sunlight, plants on the earth______ well.
A. would not grow
B. will not grow
C. had not grown
D. would not be grown

[单项选择]People cannot survive without plants.

[单项选择]In almost all chemical-process plants, heat is ______ by burning of fossil fuels-coal, oil, or natural gas.
A. transformed
B. conducted
C. transferred
D. generated

[单项选择]

The amount of sunlight reaching Earth’s surface appears to be growing. The phenomenon, which some dub "global brightening," (1) scientists with a puzzle. If the (2) is real and global, how long will it last and what are the consequences for climate change, the planet’s water cycle, and other (3) that draw energy from sunlight (4) , the answer might seem obvious: More sunlight reaching the ground in a warming world means that temperatures will get warmer (5) Not so fast, some researchers say. Additional warming would be certain (6) nothing else in the climate system changes. And the climate system is (7) static. Some combinations of changes could reinforce the heating; others could (8) it. Unraveling these interactions and forecasting their course require an accurate accounting of the sunlight reaching the surface and the (9) the surface sends skyward. Moreover, researchers say, measurements of the sun&r
A. faculty
B. team
C. group
D. staff