大失血、失水在心脏听诊时会出现( )。A．第一心音增强 B．第

搜题请搜索小程序“爱下问搜题”

问题单项选择题

大失血、失水在心脏听诊时会出现( )。

A．第一心音增强

B．第一心音减弱

C．第二心音增强

D．第二心音减弱

E．第一心音不变

答案

参考答案：A

选择题

----Do you think our basketball team played very well yesterday?

----- Yes! _________________.

A．They were not nervous at all

B．They are still young

C．They played hardly

D．They couldn’t have played better

填空题

软件定义时期主要包括______和需求分析两个阶段。