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【单选题】
下列溶液中能够区别SO 2 和CO 2 气体的是 [ ] ①石灰水 ②H 2 S溶液 ③酸性KMnO 4 溶液 ④氯水 ⑤品红溶液A.
①②③
B.
②③④
C.
除①外
D.
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【简答题】分析下图所示逻辑电路的功能。
【简答题】分析下图所示逻辑电路的功能。
【单选题】There were so many people that police found it very hard to bring the situation( )control.
A.
At
B.
under
C.
with
D.
on
【单选题】The listeners were much than hoped. There were so many tickets left.
A.
fewer
B.
larger
C.
more
D.
less
【简答题】A young mother thought that it was very wrong to waste any food when there were so many hungry people in the world. One evening, she was giving her small daughter her tea before putting her to bed. Fi...
【简答题】试分析下图所示逻辑电路的功能。
【单选题】The girl was drowned unfortunately. She ____, though, because there were so many people standing on the banks at that moment.
A.
should have saved
B.
could have been saved
C.
should be saved
D.
couldn’t have been saved
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