具有疏肝解郁，调经止痛，理气调中功效的药物是A．陈皮 B．青皮 C．枳实 D．佛手

（三选一）【选修5：有机化学基础】

2005年的诺贝尔化学奖颁给了3位在烯烃复分解反应研究方面做出突出贡献的化学家。烯烃复分解反应实际上是在金属烯烃络合物的催化下实现   C=C   双键两边基团换位的反应。如下图表示了两个丙烯分子进行烯烃换位，生成两个新的烯烃分子为丁烯和乙烯。         

 现以石油裂解得到的丙烯为原料，经过下列反应可以分别合成重要的化工原料I和G。I和G在不同条件下反应可生成多种化工产品，如环酯J。  

请按要求填空：

（1）写出下列反应的反应类型：①__________，⑥__________，⑧__________。

（2）反应②的化学方程式是_____________________________。

（3）反应④、⑤中有一反应是与HCl加成，该反应是________（填反应序号），设计这一步反应的目的是_______________________，物质E的结构简式是______________。

（4）反应⑨的化学方程式是__________________。

（5）反应⑩的化学方程式是__________________。

WASHINGTON—Laura Straub is a very worried woman. Her job is to find families for French teenagers who expect to live with American families in the summer.

It is not easy, even hopeless.

“We have many children left to place—40 out of 75,” said Straub, who works for a Paris-based foreigner-exchange program started 50 years ago. Family life was more than accommodating (提供膳宿). For one thing, more mothers stayed at home. But now, increasing numbers of women work outside the home. Exchange-student programs have struggled in recent years to sign up host (主人) families for the 30 000 teenagers who every year come from abroad to spend a school year in the United States, as well as the thousands more who take part in summer programs.

School systems in many parts of the U.S., unhappy about accepting non-taxpaying students, have also strictly limited the number of exchange students they accepted. At the same time, the idea of hosting foreign students is becoming less exotic.

In search for host families, who usually receive no pay, exchange programs are increasingly broadening their requests to include everyone from young couples to retirees.

“We are open to many different types of families,” said Vickie Weiner, eastern area director for ASSE, a 25-year-old program that sends about 30 000 teenagers on school-year exchange programs worldwide.

For elderly people, exchange students “keep us young—they really do”, said Jen Foster, who is hosting 16-year-old Nina Post from Denmark.

小题1:The underlined word “exotic” means _________.

A．difficult

B．wonderful

C．exciting

D．accommodating小题2:According to the text, why was it easier for Laura Straub to find American families for foreign students?

A．More mothers wasn’t working outside and was able to afford to look after children .

B．American school systems were better than now.

C．Foreign students paid hosting families a lot of money.

D．The government was happy because it could gain tax.小题3:Which of the following statements is true according to the passage?

A．All the families can host foreign students.

B．Only young couples can host foreign students.

C．Only those who were retired can host foreign students.

D．Exchange programs are open to many different types of families including everyone from young couples to retirees.小题4:Which of the following is the best title of this passage?

A．U.S. Struggle to Find host Families

B．Idea of Hosting Students is Different

C．Foreign-exchange Program Is Going on

D．Exchange Students Keep Old People Young

黑仔一身黑毛，蓝仔的毛色是蓝中有黑，那媚媚的毛是什么颜色的。（）

A.色

B.色

C.绿

试述HIV职业暴露的传染源。

包装、废玻璃等废弃物流如果远程运输运费较大，则不如重新购买原材料，所以宜（）为主。