下列说法或表达正确的是 ①次氯酸的电子式为 ②含有离子键的化合物都是离子化合物

发布时间：2017-05-11 15:07 │ 来源：www.tikuol.com

题型：选择题

问题：

下列说法或表达正确的是

①次氯酸的电子式为

②含有离子键的化合物都是离子化合物

③强电解质溶液的导电能力一定比弱电解质溶液强

④丁达尔效应可用于区别溶液和胶体，云、雾均能产生丁达尔效应

⑤将金属a与电源的正极相连，将负极接到废铁上，可防止金属a被腐蚀

A．①③⑤

B．①②③

C．②④

D．④⑤

考点：质量守恒定律阿伏加德罗定律晶体、非晶体

题型：选择题

完形填空。

     I work   1   a small shop. It is near a factory. Every day   2   people come to the shop   3   things.
My   4   is very near the shop. I get   5   at six, have   6   and then go to work by bike. I put some food
in my lunch box.
     I get to the shop at seven. At seven thirty people begin to get there. They buy   7    , eggs and many
other things.
     I have my lunch   8   . At seven in the evening, we close the shop. I clean the shop and then go home
  9   supper.
     Some people may not think my work   10   good. But I like it very much.

( ) 1. A. on
( ) 2. A. much
( ) 3. A. to buy
( ) 4. A. family
( ) 5. A. up
( ) 6. A. lunch
( ) 7. A. many bread
( ) 8. A. in the middle of the day
( ) 9. A. at
( ) 10. A. is

B. near
B. a lot
B. to sell
B. home
B. down
B. supper
B. some meats
B. in the morning
B. for
B. are

C. behind
C. many
C. buys
C. houses
C. off
C. breakfast
C. one kilo and a half milk
C. in the afternoon
C. up
C. isn't

D. in
D. a little
D. sells
D. bedrooms
D. on
D. meals
D. a lot of drink
D. in the evening
D. down
D. aren't

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A．患者侧坐于摄影台侧
B．前臂尺侧应靠近暗盒
C．使肘部屈曲约呈90°
D．肩部放低与肘部平齐
E．掌面内旋平放于床面

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读太阳光照图，图中阴影部分表示黑夜，据图回答下列问题。

该图为北半球（）（节气）的太阳光照图。

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我国现行的碘盐浓度标准中，居民户层次为

A．20～40mg/kg
B．20～50mg/kg
C．(50±15)mg/kg
D．＜1mg/kg
E．＜5mg/kg

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