陈某，30岁，于23：00顺利分娩一女婴，至次晨7:00未排尿，主诉下腹胀痛难忍，查

鲫鱼能保持鱼体平衡，主要靠的一组是（　　）

A．胸鳍和腹鳍

B．背鳍和臀鳍

C．尾鳍和臀鳍

D．胸鳍和尾鳍

对新购的门式钢管脚手架构配件如何进行验收？对周转使用的构配件的质量类别如何判别及维修使用？

钢的熔炼成品的检验试样是从（）取的。

Applications put computers to practical business (67) , but below the (68) it’s the heart of an operating system-the kernel-that provides the technical wizardry to juggle multiple program, connect to networks and store (69) .
A traditional kernel provides all the functions for applications. The kernel (70) memory, I/0 devices and parcels out processor time.
The kernel also supports security and fault (71) , which is the ability to recover automatically when parts of the system fail.

A．earth

B．bottom

C．table

D．surface

一种微弱的、持续时间较长的，带有弥散性的情绪状态叫做（）

A.心境

B.激情

C.恐惧

D.应激