单选题：The ejection fraction rate of the patients with stem cell in

题目内容：

The ejection fraction rate of the patients with stem cell injections decreased． A．Right
B．Wrong
C．Not mentioned

参考答案：

答案解析：

The study actually proved for the first time the benefit of

The study actually proved for the first time the benefit of stem cell therapy．A．

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Her mood can be gauged by her reaction to the most trivial of incidents．A．displa

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Many scientists have been probing psychological problems．A．solving B．exploring C

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These are the motives for doing it．A．reasons B．excuses C．answers D．replies

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