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【单选题】
玻璃膜钠离子电极对钾离子的选择性系数为 2.5 × 10 -3 ,这意味着此电极对钠离子的敏感为钾离子的 ( )A.
0.002 倍
B.
0.25 倍
C.
400 倍
D.
2000 倍
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举一反三
【简答题】A．Pretend to be what the company wants. B．Tell the truth, exclude for what you don't want them to know. C．Tell the whole truth. D．Answer it in a roundabout way.
【单选题】The only trouble with young drivers is that
A.
they tend to own sports ear.
B.
they are too proud of their ears.
C.
they soon become like the older ones.
D.
they think they are on the battlefield.
【单选题】—Remember not to pretend to know what you don’t know. — _____. My last lesson is still fresh.
A.
No, I will
B.
No, I won’t
C.
Yes, I won’t
D.
Yes, I will
【单选题】Don’t pretend _____.Look!You are holding your English book upside down.
A.
to read
B.
to have read
C.
to be reading
D.
reading
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