某有机物的结构为如图所示，这种有机物不具有的性质是（） A

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问题选择题

某有机物的结构为如图所示，这种有机物不具有的性质是（　　）

A．使酸性KMnO₄溶液褪色

B．能跟NaOH溶液反应

C．能与溴水发生取代反应

D．能发生加聚反应

答案

答案：C

阅读理解

阅读理解。

Mike and Tom are in the same (相同的) school. They are in the same grade (年纪), too. Mike

has English classes in the morning, but Tom has English classes in the afternoon. After school, they

play games. They often play basketball, play football, fly kites and ride bikes. They can jump. swim

and sing, too. They are good students. They like their school.

根据短文内容把下面对话补充完整。

1. — _______ Toro and Mike in the same grade?

— _______, they are,

2. — Who has English classes in the afternoon?

— Tom in the afternoon.

3. — What do they do after school?

— They play _ after school.

4. — Are they _ ?

— Yes. They are.

5. — Do they like their school?

— Yes, .

单项选择题

工艺文件的签署责任中，工艺文件是否最大限度地采用典型工艺是（）签署者应负的责任。

A.会签

B.审核

C.标准化

D.编制