Jack Brown，an office worker，lives in Washington．He inherited(继承) a million dollars when he was 23，but he wasn’t happy at all．When his college friends were looking for their jobs，he didn’t have to．Jack decided to living a simple life like everyone else．He gave $l0,000 of his money to a charity(慈善机构)to help poor children live a better life．Today he is 36．He still wears cheap shoes and clothes and drives a small car only，but he is Very happy．
Up to now Jack has helped some children from poor countries all over the world，by sending them each$200 a month．The money was used for the children’s study, food, medicine and clothing．Jack receives a report each year on the children’s progress(进步)．They can write to each other．but usually the children do not speak English．
When Jack first heard about these children，he wanted to help them．“It was nothing special,” he said．“Until I went to these countries and met the children I was helping，I didn’t know anything about their life．” Once Jack went to meet a little girl in Africa．He said that the meeting was Very exciting．“When I met her．I felt very ,very happy．"he said．“ I saw that the money was used for a good cause．It brought me happiness．I want to do everything I can to go on helping those children.”
小题1:Jack didn’t need to look for a job ___________.
A．before he went to college
B．after he went to Africa
C．because he got one million dollars
D．before he received a report小题2:Jack has sent them each $200 a month to help some poor children _______．
A．only in Washington
B．only in England
C．only in Africa
D．around the world小题3:Jack learned about the children’s progress by ________.
A．visiting them each year
B．getting a report every year
C．staying with them
D．talking to them in English小题4:The underlined(划线的)words “for a good cause ”means“________” in Chinese．
A．施舍
B．行善
C．优惠
D．赏赐小题5:What’s the main idea of the story?
A．Help others，and you will feel happy．
B．It’s necessary to write letters to poor children．
C．Live a simple life，and you can give others help．
D．Enjoy life.
达平衡后，H2和SiHCl3物质的量浓度分别为0.140mol/L和0.020 mo1/L，若H2全部来源于离子交换膜法的电解产物，理论上需消耗纯NaCl的质量为_______ kg。