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举一反三
【单选题】关于乙烯,下列说法不正确的是( )。
A.
乙烯分子为平面结构
B.
乙烯能使酸性高锰酸钾溶液和溴水 褪色
C.
乙烯属于饱和烃
D.
乙烯可以作为植物生长调节剂，具有催熟作用
【单选题】What is the proposal drawn by an international panel?
A.
The expansion of the UN Security Council from 16 to 24.
B.
The Security Council should be more proactive in authorizing the use of force.
C.
Adding seven new permanent members in the UN Security Council.
D.
States cannot use force preemptively.
【单选题】According to the passage, which of the following statements about retired people in the United States is tree?
A.
Many of them have a very hard life.
B.
They cannot live a decent life without enough bank savings.
C.
They rely mainly on their children for financial support.
D.
Most of them live with their children and therefore are well looked after.