一个典型的国际采购办公室的功能包括（）。 A.对当地供应商的评估、选择和谈判 B.采

The tradition of birthday parties started a long time ago. There are some traditions that you can find almost anywhere, anytime, such as sending birthday cards, blowing out the candles(吹熄蜡烛) on a birthday cake and singing the ‘Happy Birthday’ song. Others are only found for certain ages and in certain countries.

In China, on a child’s second birthday, family members put many things on the floor around the child. According to Chinese tradition, the first thing that the child picks up tells you what job the child will choose later in life.

For Japanese children, the third, fifth and seventh birthdays are especially important. At this age, there is a special celebration(庆祝) Shichi-Go-San (seven, five, three in Japanese) when children go to the temple wearing a new kimono (和服). The priest (僧侣) gives them special sweets, and the parents usually organize a party for their friends in their home.

In Argentina, Mexico and several other Latin American countries, girls have a special birthday celebration when they reach the age of fifteen. After a special ceremony (仪式), the girls dance a waltz with their father and other boys.

Eighteen is the traditional ‘coming of age’— the age when (in many countries) you have the right to vote (选举权), join the army （参军）and (in Britain) drink alcohol （酒）or buy a house.

In many English-speaking countries, a twenty-first birthday cake often has a key on top, or the cake itself is sometimes in the shape of a key. The key means that the young person is now old enough to leave and enter the family home at any time they want to! 

小题1:Which of the following birthday traditions can you find almost anywhere, anytime?

A. Putting many things on the floor.

B. Sending birthday cards.

C. Dancing a waltz.                         

小题2:Mexican girls have a special birthday celebration at the age of       .

A. five           B. seven              C. fifteen 

小题3:In many countries you can ___ when you reach the age of eighteen.

A. join the army    B. have a key    C. have a special ceremony  

小题4:Which of the following sentences is NOT true?

A. The tradition of birthday parties started a long time ago.

B. Some birthday traditions are only found in certain countries.

C. You become the owner of your house at the age of fifteen.

小题5:Which is the best title of this passage?

A. Birthday Traditions around the World 

B. The Drinking Age in Many Countries

C. Japanese Special Celebration

某同学利用如图1所示电路来测量电阻R_x的阻值。将电阻箱接入a、b之间，闭合电键。适当调节滑动变阻器R′后保持其阻值不变。依次改变电阻箱的阻值R，读出相应电压表的示数U，得到如图2所示的U－R图像。

（1）用待测电阻R_x替换电阻箱，读得电压表示数为2.00V。利用U－R图像可得R_x=_______Ω。

（2）若电路中使用的电源为一组新的干电池组成的电池组，其内阻可忽略不计，根据U－R图像可得该电池组的电动势为_______V；滑动变阻器R′此时的阻值为R′=_______Ω。

（3）电池使用较长时间后，电动势可认为不变，但内阻增大。若仍用本实验装置和U－R图像测定某一电阻，则测定结果将_______(选填“偏大”、“偏小”)。为了消除这一因素造成的影响，现找来一只阻值为10Ω的定值电阻换接在a、b之间，则应________（选填“增大”或“减小”）滑动变阻器R′的阻值，并使电压表的示数为________V。经过这样调节之后，只要保持滑动变阻器R′阻值不再变化，仍可利用本实验装置，用待测电阻R_x替换定值电阻，利用U－R图像实现对待测电阻R_x的准确测定。

上焦热盛可见于（）

A.自汗

B.盗汗

C.大汗

D.战汗

E.头汗

妥善调适朋友关系的技法有（）

A.朋友交往要有诚心，相处要讲信用

B.朋友相处要满腔热情，要重感情、重情义

C.朋友相处要互相学习、互相帮助，要宽容礼让

D.结交朋友要以慎重为原则，积极选择至友

E.亡羊补牢、未为迟也，选错朋友及时分手

由于（）的存在，将导致光波的偏振状态沿光纤长度变化，导致偏振模色散。

A.线性效应

B.非线性效应

C.双折射效应

D.光纤辐照效应