单项选择题
1、
A．A
B．B
C．C
D．D


2、 (    )
A．关于原点对称    
B．关于z轴对称
C．关于直线y=1对称    
D．关于y轴对称


3、 不等式|x-2|≤7的解集是
A．{x|x≤9}
B．{x|x≥-5}
C．{x|x≤-5或x≥9}
D．{x|-5≤x≤9}


4、 下列各组气态氢化物中，其热稳定性由大到小顺序排列的是（　　）



5、 X、Y、Z三种元素的原子具有相同的电子层数，它们的价含氧酸的酸性强弱顺序是H₃XO₄2YO₄4．则下列说法正确的是（　　）
A．原子序数X>Y>Z
B．原子半径XC．气态氢化物的稳定性H₃X>H₂Y>H₂
D．元素的非金属性X

6、
 


7、 阅读下列短文，回答题。
Much of the best food in the world is free. These are some of the foods which you can pick for free in Europe.
Every autumn,people all over Europe go out into the woods and fields to look for mushrooms( 蘑菇). People in France, Germany,Poland and Italy are very interested in mushroom picking. You have to be very careful when you pick wild mushrooms. Some are delicious, but others that look very like them can give you a stomachache. Some kinds of mushroom are dangerous and can make you ill or even kill you.
The most famous and delicious kind of mushroom is the truffle(块菌). It grows underground in forests, especially in Italy and France. It is very difficult to find. Farmers usually go out with dogs or pigs. When the animals get excited and start to dig, they know that there are truffles underground.
They dig them up very carefully. Truffles are very valuable. They can be black or light brown or white.
In the countryside, there are lots of different fruits to pick. In June you may find wild strawberries. The best time to look for them is in the evening. If you walk around in woods, sometimes you will smell them before you see them. The blackberry(黑莓) is also well liked. It grows wild round the edges of fields in September and early October.
Blackberries are black and small and very sweet. You can eat them as they are with sugar and cream. Or you can cook them for four minutes with some sugar and a little lemon juice. You can also make a very good jam with them.
What is the passage mainly about?
A．Wild mushrooms.
B．Truffles and fruits.
C．Best food in the world.
D．Food you can pick for free.


8、 下列各组词语中，没有错别字的一组是（　　）
A．安详  耸人听闻    揣摹  踌躇满志
B．瑕疵  融会贯通    笼络    负隅顽抗
C．廉耻  明辩是非  诠释  按部就班
D．芜秽  金碧辉煌  企慕  水泄不通


填空题
9、



10、 将8．4g铁粉跟50 mL盐酸充分混合反应后，有固体剩余，同时收集到1．12 L(标准状况下)H₂．原盐酸的物质的量浓度为______mol／L．

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