土石方工程施工时，填方宜采用同类土填筑，如采用不同透水性的土分层填筑时宜采用( )

能降低血压但伴有反射性心率加快，易导致心肌缺血的药物是（）

A．硝苯地平

B．卡托普利

C．普萘洛尔

D．氯沙坦

E．氢氯噻嗪

桑螵蛸用于（）

A.肾阳虚所致的遗精滑精

B.脾虚久泻，食欲不振

C.肺虚久咳，久泻久痢

D.收敛止血

年旅客吞吐量（）万人次以上的机场，应当每周向民航总局报告机场运行情况，报告应当抄送民航地区管理局。

A.1000

B.100

C.10

D.10000

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．error

B．question

C．tolerance

D．problem