下列有关企业年金运营的说法，正确的有（）。 A.企业年金计划实行市场化运营，其账户资

任何一个法律关系的参加者都是作为权利和义务的担当者出现的。 ( )

对于等物质的量浓度的Na₂CO₃和NaHCO₃溶液，下列说法不正确的是( )

A．分别升高温度，两种溶液的pH均减小

B．相同温度下两种溶液的pH：Na₂CO₃> NaHCO₃

C．分别加入少量NaOH，两溶液中c(CO₃^2-)均增大

D．两溶液均存在c(Na^＋) + c(H⁺)＝c(OH^－) + c(HCO₃^－) + 2c(CO₃^2-)

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，然后将答案写到答题卡相应的位置上。选项中有两项多余选项。（共5小题；每小题2分，满分10分）

A: Can't you do something about the service in your hotel, manager?

B:  小题1:

A: My breakfast, that's the problem.

B: Yes?

A: I ordered a breakfast from room service half an hour ago.

B: Yes?

A: I've phoned room service three times, but my breakfast still hasn't come.

B:  小题2: Surely, you are angry.

A: I've got a meeting at nine. And now it seems I'll have to go there without breakfast.

B: Sorry, madam. You ordered breakfast half an hour ago and you've phoned three times since then

A:  小题3:

B: You should have received your breakfast no later than five or ten minutes after you'd ordered it.

A: 小题4:

B: 1'll work into this and make sure that the breakfast is sent to you immediately. Full English breakfast, was it?

A: Yes. Full English breakfast.

B:  小题5:

A: Thanks.

A．I see.

B．That’s right.

C．You are welcome.

D．So what, madam?E. That’s what I thought.

F. Sorry, madam. What’s the problem exactly?

G. I’ll deal with this and have it sent to your room right away.

在帐务处理上“应收帐款”和“其他应收款”科目不应也不能出现贷方余额，只能是（）或（）。

A.0

B.借方余额

C.1

D.大于0

会议的主要功能是促进商品贸易，展览的主要功能是加强信息交流和沟通。