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【单选题】
已知空间有 a 、 b 两点,电压 U ab =10V , a 点电位为 U a =4V ,则 b 点电位 U b 为( )A.
6V
B.
-6V
C.
14V
D.
-14V
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举一反三
【简答题】选择性激动β2受体的药物是（ ）
【简答题】选择性激动β2受体的药物是
【单选题】The university offers a new, more flexible program allowing students to pursue their interests.
A.
gerund
B.
present participle
C.
/
D.
/
【单选题】The courts were asked to a more flexible approach toyoung offenders.
A.
held up
B.
suffers
C.
positioned
D.
adopt
【单选题】Is it Rogers’s opinion that the Classical model of argument and even the more flexible Toulmin model tend to divide people into three camps: good guys, bad guys and the neutrals?
A.
True
B.
False
C.
It depends
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