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【单选题】
少年儿童骨中,有机质与无机质的比值约为( )。A.
1:2
B.
3:7
C.
7:3
D.
1:1
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举一反三
【简答题】So far, however, we seem oblivious of the fragility of the earth’s natural system.
【单选题】So far, however, we seem oblivious of the fragility of the earth's natural systems.
A.
weakness
B.
sensitivity
C.
uncertainty
D.
sickness
【判断题】Marketers need to understand that, in cyberspace, paid media is essentially dead; consequently, they should no longer expend any resources into paid media.
A.
正确
B.
错误
【简答题】校园内具枝刺的树种有( )、( )、( )、( )、( )。
【简答题】So far, however, we seem oblivious of the fragility of the earth's natural systems. (Para. 16)
【单选题】The two parties failed to reach an agreement; consequently, they _________their disputes for arbitration.
A.
guaranteed
B.
sponsored
C.
submitted
D.
hailed
【简答题】we seem oblivious of the fragility of the earth’s natural systems
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