心绞痛的牵涉痛表现为A．剑突下痛 B．胸骨体中段痛 C．左前臂

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问题单项选择题

心绞痛的牵涉痛表现为

A．剑突下痛

B．胸骨体中段痛

C．左前臂内侧痛

D．胸骨体上段之后痛

E．心前区痛

答案

参考答案：C

选择题

When changing lanes, adriver should use his turning signal to let other drivers know ______ [ ]

A. he is entering which lane

B. which lane he is entering

C. is he entering which lane

D. which lane is he entering

单项选择题

（EMB145）APU点火系统的点火激励器有（）个。

A.1

B.2

C.3

D.4