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【简答题】
The students were having their chemistry（化学）class. Miss Li was telling the children what water was like. After that, she asked her students, “What’s water?” No one spoke for a few minutes．Miss Li asked again，“Why don’t you answer my question？Didn’t I tell you what water is like？” Just then a boy put up his hand and said，“Miss Li，you told us that water has no color and no smell．But where to find such kind of water？The water in the river behind my house is always black and it has a bad smell．”Most of the children agreed With him． “I’m sorry，children．”said the teacher，“Our water is getting dirtier and dirtier．That’s a problem”． 小题1:The students were having their _______ class． A．English B．Chinese C．chemistry D．math 小题2:Miss Li was telling the children what ______ was like． A．water B．air C．earth D．weather 小题3:A boy said，“The water in the river behind my house is always ___．” A．white B．black C．clean D．clear 小题4:Most of the children _______ the boy． A．agreed with B．wrote to C．heard from D．sent for
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举一反三
【多选题】正常蓄水位的上限选择要考虑的因素有()
A.
坝址及库区某些地形地质情况，直接影响正常蓄水位的提高。
B.
库区淹没损失也是限制正常蓄水位提高的主要因素。
C.
必须考虑蒸发渗漏损失因素的影响。
D.
受上游梯级水电站尾水位的限制。
【多选题】坚持和完善社会主义基本经济制度,就必须毫不动摇地巩固和发展公有制经济。 在我国,社会主义公有制经济包括
A.
国有经济
B.
集体经济
C.
. 混合经济中的国有成分和集体成分
D.
外商和港澳台投资经济
【单选题】Cu－Zn原电池的电池反应为，电池符号为______。 A．(－)Zn(s)|CuSO4(c1)||ZnSO4(c2)|Cu(s)(＋) B．(－)ZnSO4(c1)|
A.
Cu-Zn原电池的电池反应为 Zn（s）+CuSO4（aq）═ZnSO4（aq）+Cu（s） ，电池符号为______。 A．(-)Zn(s)|CuSO 4 (c 1 )||ZnSO 4 (c 2 )|Cu(s)(+)
B.
(-)ZnSO 4 (c 1 )|Zn(s)|"Cu(s)|CuSO 4 (c 2 )(+)
C.
(-)Cu(s)||CuSO 4 (c 1 )|ZnSO 4 (c 2 )|Zn(s)(+)
D.
(-)Zn(s)IZnSO 4 (c 1 )||CuSO 4 (c 2 )|Cu(s)(+)
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