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【单选题】
在 R、L、C 串联电路中, 复数阻抗模 Z=( )A.
R2+L2C2
B.
(R2L2)C2
C.
1
D.
0
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举一反三
【单选题】______ Chemistry is a branch of Chemistry.
A.
Applying
B.
Apply
C.
Applied
D.
Applicant
【单选题】Why was the writer pleaded with to take chemistry or biology?
A.
Beause her professor in Yale advised her to take chemistry or biology.
B.
Because her mother attempted to persuade her to take chemistry or biology.
C.
Because she was from China.
【简答题】有人说：“因为海水含盐量高，所以海水中溶氧含量比淡水的低”。你认为这种说法对不对？
【简答题】A．Chemistry isn't hard for him. B．Physics is easy for him. C．Chemistry is easier than Physics for him. D．Physics is easier than Chemistry for him.
【单选题】What is analytical chemistry?
A.
The study of how chemicals react
B.
The analysis of other chemistry studies
C.
The identification, isolation, and measurement of chemicals
D.
The most advanced form of chemistry
【单选题】—Is chemistry more difficult than physics? — No, chemistry isn't as _____ as physics. [ ]
A.
easy
B.
difficult
C.
easier
D.
more difficult
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