正确答案:

题目：急性心肌梗塞的临床表现是缓慢的胸骨后隐痛。

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举一反三的答案和解析：

[单选题]When transmitted by a reduction gear, diesel engine speed is reduced and the torque available for work

is increased

[单选题]In fighting a fire in a fuel tank, the FIRST action you should attempt is to _____.

top off the tank to force out all vapors