1.单选题- (共2题)
| A．同一元素不可能既表现金属性，又表现非金属性 |
| B．第三周期元素的最高正化合价等于它所处的主族序数 |
| C．短周期元素形成离子后，最外层都达到8电子稳定结构 |
| D．同一主族的元素的原子，最外层电子数相同，化学性质完全相同 |
2.选择题- (共3题)
Before you go to another country, it is a great help if you know the language and some of the customs（风俗）of the country.
When people meet each other for the first time in Britain, they say “How do you do?” and shake hands. Usually they do not shake hands when they just meet or say goodbye. But they shake hands when they haven't met for a long time or when they will be away from each other for a long time.
Last year a group of German students went to England for a holiday. Their teacher told them that the English people hardly ever shake hands. So when they met their English friends at the station, they kept their hands behind their backs. The English students had learned that the Germans shake hands as often as possible, so they put their hands in front and got ready to shake hands with them. It made both of them laugh.
Before you go to another country, it is a great help if you know the language and some of the customs（风俗）of the country.
When people meet each other for the first time in Britain, they say “How do you do?” and shake hands. Usually they do not shake hands when they just meet or say goodbye. But they shake hands when they haven't met for a long time or when they will be away from each other for a long time.
Last year a group of German students went to England for a holiday. Their teacher told them that the English people hardly ever shake hands. So when they met their English friends at the station, they kept their hands behind their backs. The English students had learned that the Germans shake hands as often as possible, so they put their hands in front and got ready to shake hands with them. It made both of them laugh.
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【1】题量占比
单选题:(2道)
选择题:(3道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：2
7星难题：0
8星难题：0
9星难题：0