资本区别于一般货币的根本特征是（）。A．资本的风险性 B．资本的返回性 C．资本的运

Do you know who is the most popular star on the Internet now? Yes, he is “Brother Coat”Zhu Zhiwen!

A few months ago, Zhu Zhiwen was an unknown farmer. A video of his show has been watched by more than millions of people，now his videos are the most popular. Zhu Zhiwen attracts Chinese netizens' hearts. And he is called “Brother Coat” by them.

In March 2011, he took part in a program called “I’m a Big Star”. He walked out onto the stage in a dark green coat. Then he began to sing the me song of the TV drama Romance of Three Kingdoms. When the audiences heard rich and powerful voice，all of them stood up and cheered. After that, he became a well-known person. The judges asked him if he had any professional training. Zhu said no.“When he started, I thought someone played the original tape(原声带) by mistake. But later on, I got it, "said one of them, “we can’t judge a book by its cover.” At last, he won the first prize in the program of “I’ m a Big Star”．

Zhu Zhiwen was born in a village of Shandong in 1969. He liked listening to the radio. When the music played, he sang it along. Every morning, he would get up early and practiced singing near a river. He keeps doing it for nearly 30 years.“When I’m working in the fields, ”said Zhu Zhiwen, “I often sing for myself, some villagers even think me crazy，but I really love it. I’m not singing for money, I’ m singing for ordinary people in China.”

Mrs. Sun, a 56­year­old engineer, one of his fans said, “I watched his videos without getting tired of it! It is amazing, and every time I watch it, I am filled with excitement and his voice is perfect! I am crossing my fingers in hope that he has a bright future.”

小题1:Who gave Zhu Zhiwen the nickname of “Brother Coat”?

A．His father.

B．The villagers.

C．His mother.

D．The netizens.小题2: When did Zhu Zhiwen become a well-known person?

A．In 1969.

B．In 2011

C．Two years ago.

D．A few years ago.小题3:Why did the audiences stand up and cheered when Zhu Zhiwen sang the song?

A．Because he was funny.

B．Because he wore a dark green coat.

C．Because his voice was rich and powerful.

D．Because he gave some gifts to the audiences.小题4:The underlined phrase “judge a book by cover” in Paragraph 4 means ________.

A．以貌取人

B．志存高远

C．众口铄金

D．哗众取宠小题5:Which of the following is TRUE?

A．Zhu Zhiwen is 45 years old now.

B．Mrs. Sun enujoys Zhu Zhiwen’s songs.

C．A famous singer taught Zhu Zhiwen to sing.

D．Zhu Zhiwen often sang for his fans when he was young.

晚期妊娠的羊水量一般是在（）

A.400～600ml

B.600～1400ml

C.800～1200ml

D.500～800ml

E.500～600ml

The first people who gave names to hurricanes were those who knew them best — the people of Puerto Rico. The small island of Puerto Rico is in the West Indies, off the coast of Florida. This is where all the hurricanes begin that strike the east coast of the United States. Often they pass near Puerto Rico or cross it on their way north. The people of Puerto Rico expect some of these unwelcome visitors every year. Each one is named after the Saint’s Day on which it arrives. Two of the most destructive storms were the Santo Ana in 1840 and the San Ciriaco in 1899.

Giving girls’ names to hurricanes is a fairly new idea. It all began with a story called “Storm”, written by George Stewart in 1941. In it a weatherman amused himself by naming storms after girls he knew. He named one Maria. The story describes how she Maria grew and developed, and how she changed the lives of people when she struck the United States.

Weathermen of the U.S. Army and Navy used the same system during World WarⅡ. They were studying weather conditions over the Pacific Ocean. One of their duties was to warn American ships and planes when a storm was coming. Whenever they spotted one, they gave it a girl’s name. The first one of the year was given a name beginning with [A]. The second one got a name beginning with [B]. They used all the letters from A to W, and still the storms kept coming. They had to use three lists from A to W to have enough names to go around. This was the first list of hurricane names that followed the alphabet. It served as a model for the system the Weather Bureau (局) introduced in 1942.

Before 1950 the Weather Bureau had no special system for naming hurricanes. When a hurricane was born down in the West Indies, the Weather Bureau simply collected information about it. It reported how fast the storm was moving and where it would go next. Weather reports warned people in the path of the hurricane, so that they could do whatever was necessary to protect themselves.

This system worked out fine as long as weather reports talked about only one hurricane at a time. But one week in September 1950 there were three hurricanes at the same time. The things began to get confused. Some people got the hurricanes mixed up and didn’t know which was which. This convinced the Weather Bureau that it needed a code for naming the storms in order to avoid confusion in the future.

1．Hurricanes were first named after the _________.

A. date on which they occurred                         

B. place where they began

C. amount of destruction they did                     

D. particular feature they have

2．The practice of giving girls’ names to hurricanes was started by _________.

A. a radio operator        B. an author                  C. a sailor                     D. local people

3．The purpose for which weathermen of the army and navy began using girls’ names for hurricanes was _________.

A. to keep information from the enemy

B. to follow the standard method of the United States

C. not given in the article

D. to remember a certain girl

4．The Weather Bureau began naming hurricanes because it would help them _________.

A. collect information more rapidly                  

B. warn people more efficiently

C. make use of military (军事的) records          

D. remember them

某工厂仓库有一名保管员，该仓库可存放，z箱零件。该工厂生产车间有m名工人，只要仓库空闲，工人便将生产好的整箱零件放入仓库，并由保管员登记入库数量；该工厂销售部有k名销售员，只要仓库库存数能满足客户要求，便可提货，并由保管员登记出库数量。规定工人和销售员不能同时进入仓库，但是工人和工人、销售员和销售员可以同时进入仓库，其工作流程如图2-7所示。

假设系统中P操作表示申请一个资源，当执行P操作时，对信号量减1，若信号量S≥0，则执行P操作的进程继续执行，否则等待。系统中V操作表示释放一个资源，当执行V操作时，对信号量加1，若信号量S＞0，则执行V操作的进程继续执行；若信号量S≤0，则从阻塞状态唤醒一个进程，并将其插入就绪队列，然后执行V操作的进程继续。
为了利用P/V操作正确地协调工人和销售员进程之间的工作，设置了信号量S1、S2和S3，它们的初值分别为n、0和1。图2-7中的a和b应分别填写 (16) ，e和f应分别填写 (17) ，c、d、g和h应分别填写 (18) 。

A．P(S1)、V(s1)、P(S2)、V(S2)

B．P(S1)、V(S1)、P(S3)、V(S3)

C．P(S2)、V(S2)、P(S3)、V(S3)

D．P(S3)、V(S3)、P(S3)、V(S3)

读数误差主要取决于什么？