搬运一般是指在物流节点之间进行物品的处理活动。

不可抗力是指（）。

A．不能预见、不能避免并不能克服的客观情况

B．不能预见、不能避免或者不能克服的客观情况

C．不能预见和不能避免或者不能克服的客观情况

D．不能预见或者不能避免并不能克服的客观情况

下列组合中，均属植物性蛋白质常见限制氨基酸的是

A．赖氨酸、色氨酸、苏氨酸

B．组氨酸、蛋氨酸、缬氨酸

C．亮氨酸、苏氨酸、苯丙氨酸

D．赖氨酸、组氨酸、亮氨酸

E．苏氨酸、赖氨酸、异亮氨酸

骨质软化是单位体积内骨组织有机成分正常而钙化不足。

阅读理解。

     "Tipping" (给小费) is always a difficult business. You do not want to give too much or too little, or tip the

wrong person.

     In Britain and America, people usually tip waiters in restaurants, porters, taxi drivers and hairdressers. They

do not tip people in offices, cinemas, garages or airports.

     Do you invite your friend to the restaurant? Then you pay the bill. Does your friend invite you? Your friend

pays. If there are men and women in the party, men usually pay.

     These days, men and women are equal in many ways. If you work in Britain or America, your boss could

be a man or a woman. There are increasing numbers of women in important positions in politics, law, medicine

and the business world. But it is still polite for men to open doors for women and to ask them to go first. And

it is polite for men to stand up when they are introduced to women.

1. In this passage, the writer tells us _____.

A. not to give any tip to others

B. only to give tips to women

C. only to give tips in restaurants

D. to give tips to the right person

2. If you have had a meal with your friend in a restaurant, _____. 

A. you should pay the bill

B. your friend should pay the bill

C. the person who invites the other person should pay the bill

D. you should ask your friend to pay the bill

3. Today in Britain and America _____.

A. women are quite equal to men

B. men hold all the important positions in politics

C. women hold all the important positions in business

D. women have changed their conditions in many ways

4. It is impolite for a man to _____.

A. open a door for a woman and to go first himself

B. stand up when he is introduced to a woman

C. stand beside a woman

D. let a woman go first

组合型投资战略有（）

A、同时组合

B、逆向组合

C、顺序组合

D、颠倒组合