白蜡囊介亮虫每头雌虫产卵（）粒。

如图所示，叠放在一起的A、B两绝缘小物块放在水平向右的匀强电场中，其中B带正电q而A不带电．它们一起沿绝缘水平面以某一速度匀速运动．现突然使B带电量消失，同时A带上正电q，则A、B的运动状态可能为（ ）

A．一起匀速运动

B．一起加速运动

C．A匀加速，B匀减速

D．A匀加速，B匀速

以下移植方法哪种存活率最高（）。

A.同系移植

B.自体移植

C.同种异体移植

D.异种异体移植

E.充分配血及组织配型后移植

解析法相对定向中，一个像对所求的相对定向元素共有（）个。

A.4

B.5

C.6

D.7

English is a very interesting language. It has borrowed words from many other languages. Immigrants(移民) coming into the United States have contributed many words to the language, which have kept their original pronunciation. “Coolie” and “kowtow” were taken from the Chinese language, “kamikaze from the Japanese, “shampoo” from India, “blitz” from German, “amigo” and “Los Angeles” from Spanish and so on.

Many students have studied English for years, some as many as eight. However, some students still have difficulty in speaking fluent English. Some know many words but are unable to discern them when native speakers use them. In our Oral English classes we will focus on speaking and listening to native English speakers. For this reason, because we are trying to train your ears to hear English and your mouths to speak intelligible (易理解的) English, we will have a rule that ONLY ENGLISH will be spoken in our English classes. Anyone speaking Chinese in class will be required to pay a fine in order to encourage the speaking and understanding of English. If teachers enter a classroom and discover that anyone is speaking Chinese, they will require everyone in the room to pay the fine. It is everyone’s job to enforce the English-Only rule. It is for your benefit. It is because we want to accustom (使习惯于) your ears to hearing English.

Other subjects may be learned solely from books but the only way to learn a foreign language is to SPEAK IT! Students are often nervous about speaking in class at first but we hope to make the classes fun, so you will forget your nervousness and learn to speak out. Enjoy your classes.

小题1:The first paragraph is mainly about________.

A．the difficulty of learning English.

B．how interesting and various English is

C．different words in different languages

D．the immigrants’ contributions to America小题2:The underlined word “discern” in Para 2 can be replaced by___________.

A．understand

B．notice

C．hear

D．speak小题3:In the author’s opinion , the only way to learn a language well is to__________.

A．listen to it on the radio

B．learn it from books

C．play games with it

D．speak it often小题4:The article is probably aimed at________.

A．Japanese students

B．German students

C．Chinese students

D．Indian students

教师加强自身的学习，努力钻研教育理论，以使自己灵活地解决教学中的实际问题。这时教师所扮演的主要角色是（）

A.教书的角色

B.育人的角色

C.管理的角色

D.研究的角色