电动机容量在（）KW以上的，设置差动保护。A、1200KW；B、500KW；C、20

Cara Lang is 13. She lives in Boston, Massachusetts, in the U. S. Last Thursday, she didn't go to school. She went to work with her father instead. Every year, on the fourth Thursday in April, millions of young girls go work. This is Take Our Daughters to Work Day. The girls are between the ages of 9 and 15. They spend the day at work with an adult, usually a mother, father, aunt, or uncle. They go to offices, police stations, laboratories, and other places where their parents or other family members work. Next year, the day will include sons, too.

The Ms. Foundation, an organization for women, started the program about ten years ago. In the U.S., many women work outside the home. The Ms. Foundation wanted girls to find out about many different kinds of jobs. Then, when the girls grow up, they can choose a job they like.

Cara's father is a film director. Cara says, “It was very exciting for me to go to the studio with my dad. I saw a lot of people doing different jobs.” Many businesses have special activities for girls on this day. Last year, Cara went to work with her aunt at the University of Massachusetts. In the engineering department, the girls learned to build a bridge with toothpicks and Candy. In the chemistry department, they learned to use scales. They learned about many other kinds of jobs, too.

Right now, Cara does not know what job she will have when she grows up. But because of Take Our Daughters to Work Day, she knows she has many choices.

小题1:What is Cara's father?

A．An engineer.

B．An official.

C．A moviemaker.

D．A professor.小题2:According to the passage, Take our Daughters to work Day is ______.

A．on every Thursday in Apri

B．a holiday for girls of all ages

C．a day for girls to know about jobs

D．a day for girls to get a job easily小题3:On this special day, Cara has done all the following EXCEPT that ____.

A．she learned to use scales

B．she worked as an actress

C．she went to work with her aunt

D．she used toothpicks and Candy to build a bridge小题4:What is probably the best title for the passage?

A．Cara Lang, a Fortunate Girl

B．Take Our Daughters to Work Day

C．Children's Day and Work Day

D．Ms. Foundation, an Organization for Women

试述影响国际储备需求量的主要因素。

为测定未知浓度的硫酸溶液，实验如下：用1.00mL待测硫酸配制100 mL稀H₂SO₄溶液；以0.14mol

／L的NaOH溶液滴定上述稀H₂SO₄25.00mL，滴定终止时消耗NaOH溶液15.00mL。

（1）该学生用标准0.14 mol／L NaOH溶液滴定硫酸的实验操作如下：

A．用酸式滴定管取稀H₂SO₄ 25.00 mL，注入锥形瓶中，加入指示剂。

B．用待测定的溶液润洗酸式滴定管。

C．用蒸馏水洗干净滴定管。

D．取下碱式滴定管用标准的NaOH溶液润洗后，将标准液注入碱式滴定管刻度“0”以上2～3 cm处，再把碱式滴定管固定好，调节液面至刻度“0”或“0”刻度以下。

E．检查滴定管是否漏水。

F．另取锥形瓶，再重复操作一次。

G．把锥形瓶放在滴定管下面，瓶下垫一张白纸，边滴边摇动锥形瓶直至滴定终点，记下滴定管液面所在刻度。

①滴定操作的正确顺序是(用序号填写)：　　　　　　　　　　　　　　　。

②该滴定操作中应选用的指示剂是： 　　　　　　　　　　　　　　　　。

③在G操作中如何确定终点?                                       。

（2）碱式滴定管用蒸馏水润洗后，未用标准液润洗导致滴定结果(填“偏小”、“偏大”或“恰好合适”)       ，原因是                              。

新生儿在香港的住院费用能否报销？在深圳参加的儿童医保。咨询电话多少？

在CD光盘上标记有“CD-RW”字样，此标记表明这光盘______。

A．只能写入一次，可以反复读出的一次性写入光盘

B．可多次擦除型光盘

C．只能读入、不能写入的只读光盘

D．RW是Read and Write的缩写