下列有关力的说法中正确的是(　 　) A．力的产生离不开施力物体，但可以没有受力

地球上有______个大洲，______个大洋．

用于治疗斑疹伤寒的首选药物是（ ）

A．氨苄西林

B．青霉素

C．链霉素

D．四环素

根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。（每小题1分，共5分）

M：Hi．Jenny．Nice to meet you here! Have you got everything ready for Christmas?

W：61．What about you，Mike?

M：62．By the way，have you read this news in the newspaper? Two men broke into a store near here last night and took more than $4,500 in cash．

W：63．Two young men held up my husband on the street last week in the middle of the afternoon.

M：Really? 64．Where did that take place?  

W：65．Right in front of the cinema．

A．I’m sorry to hear that

B．No．I came here to get some meat and fruit

C．Only a block from here

D．I think I can get everything ready todayE. How much did it cost you?

F. That’s nothing

G. Good luck to you

关于电击伤哪项不正确

A．电击伤又称触电

B．电源直接接触体表发生电击最常见

C．雷击不是电击伤

D．高电压电场下，不直接接触电源亦有触电可能

E．以上均正确

Word 2000的[插入]菜单中的[图片]命令可插入（）。

A、图表

B、艺术字

C、剪贴画

D、函数