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【单选题】
叶脉常在叶片背面隆起,是因为叶的背面()发达A.
机械组织
B.
薄壁组织
C.
分泌组织
D.
保护组织
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举一反三
【简答题】Sales reached a peak in the middle of the quarter in 1990 before decreasing slightly, whereas in 2000 sales fluctuated throughout the quarter.
【单选题】—Can you tell me _______? —She is in the computer lab. [ ]
A.
where Linda was
B.
where is Linda
C.
where was Linda
D.
where Linda is
【简答题】有价值的(汉译英)
【单选题】After ______appeared to be an endless waiting, it was her turn to be examined.
A.
that
B.
where
C.
which
D.
what
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