溶液稀释时，溶液的摩尔电导率（）。 A.下降 B.上升 C.先下降后上升 D.先上升

木糖醇（C₅H₁₂O₅）是一种甜度相当于蔗糖、易溶于水的白色固体。近年来，市场上木 糖醇口香糖正逐渐取代蔗糖口香糖。下列有关它的说法不正确的是 [ ]

A．它是由三种元素组成      

B．它的相对分子质量是152  

C．它是一种有机物          

D．它的组成中碳、氢、氧元素的质量比为12:1:16

用所给单词的适当形式填空。（共10小题，每小题1分）

小题1:All of us like Mr. Li because he always answers the students’ questions ____________ (patient).

小题2:Jerry was so tired that he ____________ (fall) asleep in a short time.

小题3:This is a big tree, it has a lot of ____________ (branch).

小题4:If you can’t pull the door open, then try ____________ (push) it.

小题5:It is difficult for us ____________ (breath ) fresh air now because of too much pollution .

小题6:The Greens ____________ (have) a holiday in France right now.

小题7:____________ (get ) down , then you will be safe .

小题8:It’s wrong to cut down ________________ (million) of trees every year.

小题9:Should we have more or ____________ (few) factories in Shenzhen?

小题10: Kate always encourages us ____________ (speak) English as much as possible.

开放作文。

     根据下面提示，写一篇短文，字数不少于50。

     In your spoken English class, your teacher shows you the following picture. You are asked to describe

the picture and explain how you understand it.

     ___________________________________________________________________________________

______________________________________________________________________________________

在停电的设备或母线上作业前，应经检验确无（）后方可装设接地线，装好接地线后方可进行作业。

关于慢性宫颈炎，错误的是（）。

A.病原体主要侵入宫颈柱状上皮所覆盖的部分

B.临床多无急性过程的表现

C.单纯型糜烂不伴间质增生

D.宫颈腺体囊肿，是病原体侵入腺体内所引起的

E.物理疗法是目前治疗子宫颈糜烂较好的方法