根据短文内容回答下列问题。
Tom is a little boy, and he is only seven years old. Once he goes to a cinema. It is the first time for him
to do that. He buys a ticket and goes in. But after two or three minutes he comes out, and buys the second
ticket and goes in again. After a few minutes he comes out again and buys the third ticket. Two or three
minutes after that he comes out and asks for another ticket. But a girl asks him, "Why do you buy so many
tickets? How many friends do you meet?" "No, I have no friends here, but a big woman always stops me at
the door and cuts up my ticket."
1. How old is Tom?
___________________________________.
2. Is it the first time for him to go to the cinema?
___________________________________.
3. How many tickets does Tom buy before the girl asks him?
___________________________________.
4. Does Tom meet a few good friends of his that day?
___________________________________.
5. Is the big woman right (正确的)?
___________________________________.
4NO+6H2O在5L的密闭容器中进行，半分钟后NO的物质的量浓度增加了0.3mol，则此反应的平均速率
(x)为[ ]
（O2）=0.01mol/（L·s） 
（NO）=0.08mol/（L·s） 
（H2O）=0.003mol/（L·s） 
（NH3）=0.02mol/（L·s） 