简述分子筛的特性。

  because  of 和 because的应用

  ①I will not go with you____him.

  ②He had to give up the job_______being ill.

  ③He was punished just____what he had said.

  ④1 went to bed early because____ (我疲倦了)．

This book is boring. There isn't _____ interesting in it. [ ]

A. something

B. nothing

C. anything

工单报结后，其合格性仍可修改。（）

对于继发性出血的处理，下列哪一项是错误的：

A．广泛渗血可用局部压迫

B．在麻醉下扩张肛管

C．寻找出血点

D．给予缝扎

E．处理大出血时，可用局部麻醉

在煤气管道基础附近打接地DN50钢管桩时，要求打入深度不小于多少米，并能接触潮土，桩间距4米？（）

A.1.5

B.2

C.2.5

D.3