下列各项中表达正确的是_刷题宝

题干

下列各项中表达正确的是（）

A：F^﹣的结构示意图：

B：CH₄分子的比例模型：

C：CCl₄的电子式：

D：乙烯的结构简式：CH₂CH₂

上一题下一题 0.0难度选择题更新时间:2018-04-11 12:47:42

答案(点此获取答案解析）

A

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下列关于材料、信息及能源的说法正确的是（）

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The following are some advertisements(广告). Read them and answer the questions.

No. 1 A big house with a big yard for a big family. There are four bedrooms, three bathrooms, a big living room and a great kitchen.
The house costs $2,000 a month. Call Mrs. Morris at 4560987.

No. 2 Great location! A nice new flat building with a swimming pool. There is a big living room, a bedroom, a bathroom and a nice kitchen.
It is $1,200 a month. The phone number is 7610201. You can ask Dana for help.

No. 3 There is a town house for you. The first floor is for playing games, and the second floor is for living. On the second floor, there is a living room, two bedrooms, two bathrooms and a nice big kitchen. There is also a great yard behind the house for children.
It is $1,7000 a month. Please call Nathan at 4645 2436.

No. 4 Here is your new home! It is a big flat with three bedrooms, a living room, a dining room and a bathroom. The flat has a good parking place(停车位) but no yard.
It is $1,600 a month. Call Wilson at 533 0202.

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填上适当的数．

8____6＜861

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\frac{x + y}{2 x y}

中的x和y都扩大3倍，且x+y≠0，那么分式的值（）

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下列划线字注音错误的一项是（）

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