技术监督工作的三级管理是怎样规定的？

After all it takes great ____ to master any foreign language.[ ]

A. effort

B. effect

C. affect

D. offer

-----Did you have a hard time traveling back home?

-----Yes, it ______ for four days when I arrived in Guiyang and all the roads______ covered with ice.

A．snowed, were

B．was snowing, had been

C．had been snowing, had been

D．had snowed, were

下述关于动脉粥样硬化性固缩肾的记述中哪一项是错误的（）

A.可引起肾血管性高血压

B.肾动脉开口处或主干近侧端狭窄

C.肾动脉粥样硬化可并发血栓形成

D.受累的肾脏出现较大块的凹陷瘢痕

E.常引起肾功能不全

血管紧张素Ⅱ受体拮抗药为

A．吡那地尔
B．氯沙坦(洛沙坦)
C．哌唑嗪
D．酮色林
E．非洛地平

音箱是一种（）

A.输出设备

B.输入设备

C.存储设备

D.运算设备