A：her
B：his
C：theirs
D：their
已知tanα=2，求解下列各式
（1）4cosα+sinα4cosα-sinα
（2）sinαcosα
化学与生活密切相关，化学使我们的生活更加美好：
2002年2005年“神舟四号”、“神舟五号”、“神舟六号”成功飞天，____成为中国飞天第一人。
从方框中选择恰当的句子完成对话。有两项多余。
A. How old are you?
B. May I have your telephone number?
C. I want to join the basketball club.
D. Can you play the violin?
E. W-H-I-T-E ,White.
F. Can you play basketball? G. What club do you want to join?
A: Can I help you?
B: Yes, please. ____
A: OK. What's your name?
B: Sam White.
A: How do you spell your last name?
B: ____
A: Thank you. ____
B: I'm fourteen.
A: ____
B: Yes, but I can't play it well.
A: I see. ____
B: Yes, it's 233-6589.
A: Thank you.
规模最大和最有影响力的全球性国际组织是（ ）
