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【单选题】
已知 CaF 2 的 K sp Ө =5.3 × 10 -9 ,在氟离子浓度为 3.0 mol ·L -1 的溶液中Ca 2+ 离子可能的最大浓度(单位为mol·L -1 )是A.
1.8 × 10 -9
B.
5.9 × 10 -10
C.
1.8 × 10 -10
D.
5.9 × 10 -9
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【单选题】求 I 1 和 V 3。
A.
V 3 =15V ， I 1 =1A
B.
V 3 =20V ， I 1 =1A
C.
V 3 =20V ， I 1 =3A
D.
V 3 =15V， I 1 =3A
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【简答题】阅读理解。 Dear Abby, I am a very conservative woman. I don't drink, dance, wear makeups or pants. I enjoy the company of friends despite (尽管) our differences and thought they enjoyed mine. On our most rec...
【简答题】Dear Abby, I am a very conservative woman. I don’t drink, dance, wear makeups or pants. I enjoy the company of friends despite（尽管）our differences and thought they enjoyed mine. On our most recent outi...
【单选题】2017 款比亚迪e5低压电池带有 BMS系统，当它监测到低压电池 SOC 低于（ ）时，将会向 BMS发送充电请求。
A.
40%
B.
20%
C.
30%
D.
. 10%
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