简述基站如何采用方便的操作和维护功能。

Can you swim? Do you like swimming? Yes? Well, how can you learn to swim? I think the best way is to go into the water and learn. I’m afraid you’ll never learn to swim just by reading books about swimming or looking at others swimming. It’s the same with the English study. We must practice, practice and practice.

Listening and speaking are very important for beginners. The children in English-speaking countries first listen to others. Then they try to imitate and speak. We can listen to English programs on radio. You may just understand a few words. It doesn’t matter. Just be relaxed, try to catch every word. Somebody may be a good listener. But he dare not speak. He’s afraid of making mistakes. You know we sometimes make mistakes when we speak Chinese. Don’t be afraid. We must be brave. If you really want to learn English well, you must try to speak with everyone as long as he knows English. Whether you know him or not is not important, when there’s nobody to talk with, you can talk to yourself in English. It’s interesting and also a good way to practice your spoken English. Remember, the more you speak, the fewer mistakes you’ll make.

Reading and writing are more important for senior school students. First we must choose the books we’re interested in. A lot of reading will improve your language sense. This is the most important.

Keep writing English diaries. We can also write English articles. You may even post them to English magazines. Don’t be afraid of failure. Failure is the mother of success.

Easier said than done. Well, let’s do more practice from now on. I’m sure you’ll learn English well in this way.

小题1:You can learn to swim by_______.

A．reading books about it

B．looking at others swimming

C．having lessons on it

D．going into the river and learning小题2:We should learn English by _______.

A．listening and speaking

B．reading and writing

C．both A and B

D．swimming小题3:What will you do with mistakes when you speak?

A．Don’t make mistakes.

B．Study hard

C．Try not to speak English

D．Don’t be afraid.小题4:What’s more important for senior school students?

A．listening

B．speaking

C．reading and writing

D．learning小题5:We can listen to English ______, according to the passage.

A．by train

B．on the radio

C．every minute

D．now and then

美国国防部曾向国会提供了一份《核态势评估报告》，内容涉及美国在紧急情况下向包括俄罗斯、中国、朝鲜、伊朗、伊拉克、利比亚、叙利亚在内的7个国家使用核武器的计划。这表明

①美国已开始把核武器作为预防和威慑战争的工具②美国抹杀了核武器与常规武器之间的界限③美国推行的是霸权主义的战略④建立核平衡是抵制美国核战略的重要途径

A．①②③

B．②③

C．①④

D．②③④

女，30岁，体检时发现，HBsAg，抗-HBc，抗-HBe阳性，判断是否有传染性还应做的检查是（）

A.肝功能

B.HBVDNA

C.HBcAg

D.肝脏B超

E.肝脏MRI

根据我国《立法法》的规定，下列哪一项属于地方性法规可以规定的事项

A．本行政区内市、县、乡政府的产生、组织和职权的规定

B．本行政区内经济、文化及公共事业建设

C．对传染病人的强制隔离措施

D．国有工业企业的财产所有制度

54岁，男。胸闷，劳累后胸痛4年，疑诊肥厚性梗阻型心肌病来诊。

影响肥厚性梗阻性心肌病流出道狭窄的因素中，下列各项错误的是

A．周围循环阻力下降时梗阻减低

B．心肌收缩力加强时梗阻加重

C．左室腔与左室流出道间压差加大时梗阻加重

D．二尖瓣前叶前移明显时梗阻加重

E．收缩期容量增多时梗阻减轻