下列化合物所含元素全属于第三周期的是（ ） A．CO2 B．Na2S C．CaF

善治肝阳上亢兼胃痛吐酸的药为( )

A．牡蛎
B．羚羊角
C．代赭石
D．罗布麻

IPv6地址长度为______位。

A．32

B．64

C．128

D．256

在Windows中，如果要把活动窗口内容复制到剪贴板中，可以按键。

A．Ctrl+PrintScreen

B．Alt+PrintScreen

C．Shift+PrintScreen

D．Ctrl+ScrollLock

E．Alt+ScrollLock

由于老年人肾功能减缓易发生不良反应的药物是（）。

A.地西泮（安定）

B.地高辛

C.庆大霉素

D.苯巴比妥

E.青霉素

Passage Two

What is the size of Larsen B ice shelf before it disintegrated in the 1900s a. It covered more than 2,000 square kilemeters, and was 300 meters thick. b. It covered more than 3,000 square kilemeters, and was 100 meters thick. c. It covered more than 3,000 square kilemeters, and was 200 meters thick. d. It covered more than 2,000 square kilemeters, and was 100 meters thick,