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【单选题】
与来源于植物的15万种天然产物相比,源于海洋生物的天然产物还很少,至2010年底也才( ),用于研究的海洋生物仅几千种。A.
1万6千
B.
1万8千
C.
2万
D.
2万5千
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举一反三
【单选题】The map was drawn to the standard ______ of 1/100000 so there was not much detail.
A.
route
B.
line
C.
rate
D.
scale
【单选题】听力原文：M: Do you want your television repaired? W: Yes, but not by the place you recommended. M: Why not? The repairmen are very good and the charges are so reasonable. W: That may be, but I couldn't fi...
A.
It needed fixing.
B.
It got lost.
C.
It couldn't receive any program.
D.
Its images were not clear.
【单选题】There was not much hope that they______
A.
are still alive
B.
are still survived
C.
were still alive
D.
were still survived
【简答题】近地气层空气中二氧化碳的浓度一般白天比晚上 ,夏天比冬天 。
【单选题】听力原文：M: Do you want your television repaired? W: Yes, but not by the place you recommended. M: Why not? The repairmen are very good and the charges are so reasonable. W: That may be, but I couldn't fi...
A.
It needed fixing.
B.
It got lost.
C.
It couldn't receive any program.
D.
Its images were not clear.
【单选题】The map was drawn to the standard______ of 1/100,000, so there was not much detail.
A.
route
B.
latitude
C.
rate
D.
scale
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