下列命题中正确的有( ) ①点C是线段AB的中点,则AC=2A B. ②若a-|a

题型:选择题

问题:

下列命题中正确的有(  )

①点C是线段AB的中点,则AC=2AB.

②若a-|a|=0,那么a<0.

③向左走3米,记作+3米;向右走2米,记作-1米.

④一个数的绝对值越小,表示它的点在数轴上离原点越近.

⑤-a是负数.

A.0个n

B.1个

C.2个

D.3个

考点:命题,定理
题型:选择题

打开form1,修改表单,有5个表单中随机排列的命令按钮,不要移动或改变“基准按钮”的位置,然后让其他命令按钮与“基准按钮”左对齐。

在这组命令按钮的右边添加一个表格控件,并将它的“recordsourceype”属性设置为“表”,再设置另一个相关属性使之在表格控件中显示“customer”的内容。

题型:选择题

汇编语言的变量类型属性如下,其中错误的类型是( )。

A.字节型

B.字型

C.字符型

D.双字型

题型:选择题

有A、B、C、D、E、五种短周期元素,A元素原子的最外层电子数比次外层多4个,B元素有3种同位素B1、B2、B3、,B3原子的质量数是B1的3倍,C是非金属性最强的元素,D和C可以形成DC型离子化合物,且离子的电子层结构相同,E的气态氢化物水溶液显碱性而其最高价氧化物对应的水化物为强酸。下列说法正确的是

A.A和B可以形成原子个数比1:1的化合物

B.离子半径:D+ > C

C.以上元素中形成的最高价氧化物对应的水化物酸性最强的是C

D.A、C、E三种元素气态氢化物的熔沸点都高于各自同主族元素气态氢化物的熔沸点

题型:选择题

Nearly everyone is shy in some ways. If shyness is making you uncomfortable, it may be time for a few lessons in self-confidence. You can build your confidence by following some suggestions from doctors and psychologists.

Make a decision not to hold back in conversations. What you have to say is just as important as what other people say. And don’t turn down party invitations just because of your shyness.

Prepare yourself for being with others in groups. Make a list of the good qualities you have. Then make a list of ideas, experiences, and skills you would like to share with other people. Think about what you would like to say in advance. Then say it.

If you start feeling self-conscious in a group, take a deep breath and focus your attention on other people. Remember, you are not alone. Other people are concerned about the impression they are making, too.

No one ever gets over being shy completely, but most people do learn to live with their shyness. Even entertainers admit that they often feel shy. They work at fighting their shy feelings so that they can face the cameras and the public. Just making the effort to control shyness can have many rewards. But perhaps the best reason to fight shyness is to give other people a chance to know more about you.

15.The main purpose of the article is to ________.

A. explain how shyness developed              

B. prove that shyness can overcome

C. persuade readers that shyness is natural   

D. recommend ways of dealing with shyness

16.Which of these can you conclude from reading the article?

A. The attempt to overcome shyness is always worthwhile.

B. Entertainers choose their work to fight shyness.

C. The attempt to overcome shyness is always successful.

D. Shy people never have any fen.

17.What is the source of the suggestions for fighting shyness?

A. The author of the article.                       B. Shy men and women.

C.Popular entertainers.                               D. doctors and psychologists.

18. Where would this article probably appear?

A. On the front page of a newspaper.           B. In a popular magazine.

C. In a science textbook.                                   D. In an encyclopedia(百科全书)。

题型:选择题

出生6个月的男婴,摔地后右手红肿,请结合CR片,选出骨折类型()

A.青枝骨折

B.横行骨折

C.斜行骨折

D.粉碎性骨折

E.压缩骨折

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