Questions 1-4

What has the man just done during his lunch break？（）

A．He’s bought his wife a present.

B．He’s missed an important phone call.

C．He’s dismissed his new secretary.

D．He’s popped out shopping.

下列事实中，能够证明HCl是共价化合物的是

A．HCl易溶于水

B．液态的HCl不导电

C．HCl不易分解

D．HCl溶于水能电离，呈酸性