以下哪一部位的菌斑与牙周组织的破坏关系最为密切（） A.光滑面菌斑 B.牙合面点隙裂

情景对话

根据对话情景和内容,从对话后所给的选项中选出能填入每一空白处的最佳选项.选项中有两个为多余选项.

   W: Welcome! What can I do for you?

   M: I'm looking for a necklace for my wife.   __1__

   W: That is so sweet! I'll help you to find one that she'll love.

   M: Really? Thanks!

   W: Sure.  __2__  

   M: I think a crystal necklace would be better because it stands for purity, and my wife likes crystals very

much.

   W: OK.  __3__  

   M: Hmmm. Let me take a look. It's very pretty, but why is it special?

   W: You see, normally a crystal pendant(吊坠) is on a gold or silver chain, but this one is on a fabric

string.  __4__  

   M: Yeah, I see what you mean. I think I'll take it.

   __5__  

   W: No problem. The wrapping will take a little while. Please wait a moment.

A．Can you wrap it for me with purple wrapping paper?    

B．I think this heartshaped one is special.

C．The crystal one is much more expensive.

D．So which would you like, a gold or crystal necklace?

E．How would you like to pay for it?

F．Tomorrow's our wedding anniversary.

G．This makes the necklace special, so it will stand out from the crowd.

下列各组离子在指定溶液中，一定能大量共存的是（　　）

A．中性溶液：Fe³⁺、Al³⁺、NO₃^-、I^-

B．能使甲基橙显橙色的无色溶液：Al³⁺、NH₄⁺、SO₄^2-、MnO₄^-

C．常温下，c（H⁺）/c（OH^-）=1×10^-12的溶液：K⁺、AlO₂^-、CO₃^2-、Na⁺

D．由水电离出的c（H⁺）=1×10^-12 mol•L^-1溶液中：K⁺、Cl^-、HCO₃^-、Na⁺

啄木鸟门诊。（修改病句）

1．无数千千万万少先队员参加了抗震救灾献爱心活动。

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2．上课的时候，发言很积极。

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3．妈妈总是经常对我说：“要好好学习。”

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建设工程项目是开放系统，受自然环境和社会环境影响很大，同时也会对社会和环境造成影响，安全控制需要把工程系统、环境系统及社会系统结合起来。这体现了安全控制的( )。

A．全面性

B．针对性

C．系统交叉性

D．应急性

发行人在上市的信息披露基本原则中，对发行人董事会全体成员必须保证信息披露内容的( )，并就其保证承担个别和连带责任。

A．真实

B．准确

C．完整

D．没有虚假、误导性陈述或重大遗漏