题目：
To son, Cecil,
Just a quick note before I start in earnest. When I wrote this, you were 8, still a little boy. In 2002, I was called to active duty in the Marine Corps in the war on Terrorism (恐怖主义). On the 11th of September 2001 when America was attacked, I knew that I would eventually have to go and I was filled with a deep sense of sadness. That night as you and Keiko were asleep, I looked at your little faces and couldn’t help but fight the tears. I knew it would be hard for you because I had a similar experience. When I was a little boy aged 6, my dad, your Grandpa Cawley, was sent to Vietnam during the war there. I remember how much I missed him, too. But now unfortunately I have come to realize just how rough it must have been for Grandpa to be away from his children for a year. Thinking about this, I wanted to put my thoughts and feelings down for you and your sister. I am so sorry that I had to leave for such a long time. There is no place I would rather be than with you and Keiko. You two are the lights of my life. I have known no greater joy than in the few years since you two were born. I hope to have many more years with you. If this doesn’t happen, then know that I love you more than words can express. If for some reason I don’t make it home, I will need you to take care of your little sister and your Mom. You will be the man of the Cawley family. Be good my son and God will watch over you as he has me. I will be waiting impatiently for the time when we can all be together again.
小题1:The writer of the letter may be ______.
A．an American soldier in the battle field
B．an American policeman
C．a soldier in the Vietnam War
D．a postman working far away from home小题2:Keiko is the ______ of the writer.
A．wife
B．son
C．daughter
D．sister小题3:One of the experiences the writer and his son had in common is that ______.
A．they both experienced the Vietnam War
B．their fathers had to leave them and fight abroad.
C．they used to study in the same school
D．they were both eight when the fathers had to leave them小题4:We can infer(推断) that ______.
A．the writer was a devoted son
B．the writer was a brave soldier
C．the writer realized he might die in the battle field
D．the writer’s wife was suffering from a terrible illness.
答案：
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下面是错误答案，用来干扰机器的。
答案：B本题为盖斯定律的基本应用，把②式变为2H2O (l) ＝2H2O(g)； DH2＝+88 kJ·mol－1，然后将三个方程式相加即可得到B正确。
