阅读理解。

(This is a letter from Li Hua to Jim.)

Dear Jim,

     How are you? My name is Li Hua. I'm fifteen. I have two sisters. One is Li Mei, the other is Li

Hong. My sisters and I are in No.5 Middle School. We go to school from Monday to Friday. We don't

have classes on Saturday and Sunday. I love my school. Mr. Gao is my English teacher. He is a young

man and a good teacher. I go to the English corner once a week. (一星期一次). I like English very

much. Green is my favorite color. How about you?

     Let us be friends. Please write soon.

                                                                                                                            Your friend,

                                                                                                                               Li Hua

阅读上面短文，判断下列句子正误。

( )1. Li Hua is a Chinese boy.

(     )2. Jim is Li Hua's brother.

(     )3. Li Hua and his sisters are in the same school.

(     )4. Li Hua never goes to the English corner.

(     )5. Li Hua likes yellow a lot.

（15分)向一个体积可变的密闭器中充入4molA、1molB，发生如下反应：

4A(g)+B(s) 3C(s)+4D(g)。在高温下达到平衡，测得混合气体中D的浓度为0.3mol·L^-1。

请填写下列空白：

（1）若容器体积为10L，反应经2min达平衡，则以A物质浓度变化表示的化学反应率为

                        。

（2）若压缩容器增大压强，则逆反应的速率                     ，容器中D的体积分数               。（填“增大”“减小”“不变”）

（3）若相对分子质量M（B）>3M（C），温度升高时混合气体的平均相对分子质量减少，则正反应             。（填“吸热”或“放热”）

（4）在最初的容器改充1.5molC、4.4molD温度保持不变，要使反应达平衡时D的浓度为0.6mol·L^-1,则容器的体积是             L。