宏观调控的手段有( )。 A．企业自我调控手段 B．经济调控手段和经济杠杆 C．法

避雷针的保护范围与避雷针的（）无关。

A、高度

B、数目

C、相对位置

D、接地装置

炮制对含生物碱类药物的影响，叙述错误的是

A．槟榔碱、小檗碱等不溶于水，炮制后溶解度增大

B．石榴皮中的生物碱遇热活性降低，故以生用为宜

C．草乌中剧毒成分乌头碱经炮制后，水解成毒性较小的乌头原碱

D．醋制延胡索，其有效成分延胡索乙素成盐，具增效作用

E．马钱子中的士的宁在炮制后转变为异士的宁

在半殖民地半封建的中国各种矛盾中最主要的矛盾是( )

A．帝国主义与中 * * 的矛盾
B．封建主义与人民大众的矛盾
C．地主阶级和农民阶级的矛盾
D．工人阶级和资产阶级的矛盾

尽管目前社会的主要权力仍掌握在男人手中，尽管男人的抽象思维和体力胜过女人，但越来越多的心理学家和生理学家研究认为，男人无论在生理上、心理上都比女性脆弱，而且有许多缺憾之处。由此可以推出( )。

A．不是所有的心理学家或生理学家认为男人比女性脆弱
B．男人依靠其抽象思维和体力掌握着社会的主要权力
C．未来社会将由女人掌握社会的主要权力
D．越来越多的研究者认为女人不存在缺憾之处

Brian arrived at San Francisco airport two hours before the flight to Paris. He was wearing three shirts, a jacket, two pairs of socks, a pair of shorts, and two pairs of jeans. He was carrying one small backpack, which was very full, but he didn’t have any other luggage. Brian needed to meet a man named Tony before he checked in for his flight. He found Tony near the Air France counter. Tony gave him a round trip ticket and a small package.

"Give this package to Jean Paul at the airport in Paris. He will have a sign with your name on it. I think you can find him easily," Tony said," You don’t have any luggage, right"

"Only this backpack," Brian answered. "You said I could bring one carry on bag. "

"That’s right. One carry on bag is fine. Have a good trip. "

"Thanks. "

is Brian a criminal Not at all. He is an air courier. And he paid only $ 110 for the round trip ticket to Paris. Air couriers get cheap airline tickets because they take important packages and papers to foreign countries. Businesses sometimes need to get packages and papers to people in foreign countries by the next day. Often, the only way they can do this is to use an air courier company. It is not cheap for a business to send a package with an air courier, but it is quick.

Every year about 80,000 people worldwide travel as air couriers. The number of tickets for courier travel is growing by about 10 percent a year. However, air courier travel isn’t for everyone. But if you have very little money, can be flexible about your travel plans, and don’t mind wearing the same clothes for a week, it can be a great way to take a vacation!

The author of the text mainly （）.

A．describes the activities of a law breaker

B．suggests an ideal way to travel

C．argues against the air courier travel

D．tells us about a developing business