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【单选题】
用电压表测得电路端电压为零，这说明。A.
外电路断路
B.
外电路短路
C.
外电路上电流比较小
D.
电源内电阻为零
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反馈参考答案：
举一反三
【单选题】硫酸与水可形成 H 2 SO 4 ·H 2 O ( s ) 、 H 2 SO 4 ·2H 2 O ( s ) 、 H 2 SO 4 ·4H 2 O ( s ) 三种水合物,问在 101 325 Pa 的压力下,能与硫酸水溶液及冰平衡共存的硫酸水合物最多可有多少种?
A.
3
B.
2
C.
1
D.
不可能有硫酸水合物与之平衡共存
【单选题】Please let us know yesterday, my daughter.
A.
where did you go
B.
which place you go
C.
did you go to the mall
D.
if you went to the mall
【单选题】—Did you eat yet? —______.
A.
Yes, let's have lunch together
B.
No, let's go there sometime
C.
No, about an hour ago
D.
Yes, about an hour ago
【单选题】---Could you let me know ________ yesterday ? ---Because the traffic was heavy .
A.
why did you come late
B.
why you came late
C.
why do you come late
D.
why you come late
【单选题】'______ you ever _______ the film?' 'Yes, let me tell you something about it.' [ ]
A.
Did, see
B.
Will, see
C.
Have, seen
D.
Do, see
【单选题】硫酸与水可形成 H 2 SO 4 ·H 2 O(s) 、 H 2 SO 4 ·2H 2 O(s) 、 H 2 SO 4 ·4H 2 O(s) 三种水合物 , 问在 101 325 Pa 的压力下 , 能与硫酸水溶液及冰平衡共存的硫酸水合物最多可有多少种 ? ( )
A.
1 种
B.
2 种
C.
3 种
D.
不可能有硫酸水合物与之平衡共存
【单选题】—_____ did you always get the first place? Could you let me know? —Only because I like it and practice every day. [ ]
A.
What
B.
When
C.
Where
D.
Why
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