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【单选题】
在高光强、高温及相对湿度较低的条件下,C 4 植物的光合速率:A.
稍高于C 3 植物
B.
远高于C 3 植物
C.
低于C 3 植物
D.
远远低于 C 3 植物
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举一反三
【单选题】-----Who ______ it be that hasn’t handed it in yesterday? ------It _______ be Bob. He handed it in yesterday.
A.
can; mustn’t
B.
must; can
C.
can; can’t
D.
may; mustn’t
【单选题】It is always true that sometimes even if you have had a big dinner, _________ are that you will still want to reach for food when it gets late．
A.
problems
B.
facts
C.
chances
D.
cases
【简答题】If you have had even limited contact with people from other cultures, you know that they differ in both ( ) and ( ) ways.
【单选题】Even if you had refused, the ______ would probably not have been very different.
A.
effect
B.
consequence
C.
result
D.
outcome
【简答题】Let’s say you have had a sore throat for several weeks . You have done everything you can to relieve (减轻）the pain: medicine, Vitamin C, and even chicken soup. All these things help your throat feel be...
【单选题】Even if you have had a big dinner, ___ are that you will still want to reach for food when it gets late．
A.
problems
B.
facts
C.
chances
D.
cases
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