A元素原子M电子层上有6个电子.B元素与A元素的原子核外电子层数相同,B元素的原

题型:问答题

问题:

A元素原子M电子层上有6个电子.B元素与A元素的原子核外电子层数相同,B元素的原子最外电子层只有1个电子.

(1)B元素的原子结构示意图为______.

(2)A、B两元素形成的化合物的名称是______,化学式是______,该化合物在无色火焰上灼烧时,火焰呈______色.

考点:原子核外电子的排布
题型:问答题

阅读理解。

     Long, long ago there lived an old man. He had a very big orange tree in his garden. On the tree there

were many fine oranges.

     One day the old man found one of the oranges was bigger than the others. It was as big as a watermelon.

So he took the big orange to the king. The king was very happy and gave the old man a lot of money for it.

     When a rich man heard of this, he said to himself, "It is only an orange. Why did the king give him so

much money? If I take my gold cup to the king, he will give me much more money for it." 

     The next day when the king got the gold cup, he said to the rich man, "What a beautiful cup! I'll give you

something for it. Please take the great orange."

根据短文内容回答下列问题.

1. What did the old man have in his garden?

    ____________________________________.

2. What did the old man find one day?

    ____________________________________.

3. Who did the old man give the big orange to?

    ____________________________________.

4. What did a rich man think when he heard of the story?

    ____________________________________.

5. Was the rich man very happy at last?

    ____________________________________.

题型:问答题

防止病邪侵害属于

A.因时制宜

B.未病先防

C.因人制宜

D.因地制宜

题型:问答题

在面向对象方法中,实现信息隐蔽是依靠

A.对象的继承

B.对象的多态

C.对象的封装

D.对象的分类

题型:问答题

沼气是一种清洁的生物能源,但使用不当会发生窒息中毒、烧伤和火灾等事故。

题型:问答题

下列各项,属于滋水涵木的适应证是

A.肾阴不足
B.肺肾阴虚
C.肝肾阴虚
D.心肾阴虚

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