二尖瓣狭窄引起肺动脉高压时，肺动脉瓣M型的特点是（） A.肺动

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问题单项选择题

二尖瓣狭窄引起肺动脉高压时，肺动脉瓣M型的特点是（）

A.肺动脉瓣曲线上的a波增大

B.收缩期曲线平直

C.肺动脉瓣曲线上的bc段呈"V"型

D.显示收缩期有高频振动运动

E.肺动脉瓣曲线上a波正常

答案

参考答案：C

填空题

商业银行业务按《企业会计准则》中的会计要素可划分为（）、负债类业务和中间业务三大类。(三级)

单项选择题

It can be inferred from the passage that Goethe's scientific contemporaries made which of the following assumptions

A．(A) The most accurate view of the universe is that of the mechanistic model.

B．(B) Science should avail itself of all possible methods of discerning the truth.

C．(C) The tangible results of scientific inquiry are more important than its philosophical assumptions.

D．(D) Poetic intensity is relatively unimportant in the expression of a scientific theory.

E．(E) Scientific theories should go far beyond the "human scale", where possible.