阅读理解：
Dear Mr. Wang, Someone comes to the office to see you in the morning, but you and your wife are out. He comes here at 10am. Because he is very busy, he goes away half an hour later. He tells me that he is your classmate at college(大学). Now he teaches Chinese in a high school(高中) in this city and he lives near the No. 6 Middle School. He is a very tall man with short hair. He wears a pair of glasses. He tells me his telephone number is 33426685. He is often at home at 7:00 pm. So you can call him in the evening.
1. The author(作者) writes this note(便条) to _____.
A. Mr. Wang
B. Mr. Wang’s wife
C. Mr. Wang’s classmate
D. me
2. Mr. Wang’s classmate is _____.
A. a teacher
B. a worker
C. a farmer
D. an actor
3. When is Mr. Wang’s classmate often at home?
A. In the morning
B. In the afternoon.
C. At 7:00pm.
D. We don’t know.
4. How long does Mr. Wang’s classmate stay in the office?
A. Ten hours.
B. An hour.
C. Two hours.
D. Half an hour.
5. Which of the following is TRUE?
A. Mr. Wang and his wife are classmates.
B. Mr. Wang’s classmate is short.
C. Mr. Wang goes out with Mrs. Wang in the morning.
D. Mr. Wang’s classmate meets Mr. Wang in the morning.
和
各0.1mol的气态混合物充入10L的密闭容器中，充分反应，连续测定
的变化，5S时测定
2HI(g)
= ；