关于“尿路血吸虫病”的特点，错误的是()A．输尿管下段钙化比上段更常见 B．输尿管中

肾脊角正常为（）

A.5°～10°

B.10～15°

C.15°～20°

D.15°～25°

E.20°～30°

()是智力发展的奠基时期.

A、0~1岁 

B、0~3岁 

C、0~5岁 

D、0~6岁

Online Communication

In an age when technology moves faster than most can keep up with, a small group of people still remain in the time of old-fashioned letter. Frankly speaking, I was once certain that traditional letters could never be replaced by other means of communication.

But a story about online communication changed my mind.

An old man, who suffered a lot from Parkinson’s disease, was not able to talk clearly and could hardly write his name. Living totally alone, he managed to keep in touch with nearly all the members of his family. How did he achieve this? He clicked out words on his computer keyboard.

I, therefore, managed to get an E-mail box as soon as the opportunity came. My life changed. E-mail, and all online communication, is something truly different. It has capabilities（能力） that few other products can match.

E-mail is convenient. It takes less time with its fast speed and 24-hour connection. The slow postal service is no match. If you wouldn’t want to have a face-to-face talk with your manager, you might talk with him through E-mail even if you are in the same office.

Naming all the good things about online communication is not easy. But wait. E-mail can be inconvenient. It can waste time and energy. Just think what may happen when you take a short vacation and return to find your e-mail box filled with 200 unread messages. You could easily spend half a day clearing junk ads.

Then, online communication will keep us staying at our computer while it connects us to distant strangers. Once we throw ourselves into the machine, we may forget the human touches we once held so dear. I’m sure there is and always will be a place for the old-fashioned letter, phone call, and face-to-face meeting… even in the world of modern communication.

As I listen to the sound of the modem(调制解调器), I was excited at stepping out to the outside world but, at the same time, I sensed a loss of control over something valuable in my personal life.

小题1:What is the most probable meaning of the underlined word “junk” in paragraph6?

A．old and useless

B．New and useful

C．Short but valuable

D．Long but clear小题2:What does the writer think of online communication?

A．It should replace old-fashioned letters completely.

B．It is perfect and always does good to you.

C．It is extremely useful and convenient, but it may be inconvenient or even harmful.

D．It does more harm than good.小题3:What caused the writer to become interested in E-mail and online communication?

A．The sound of the modem.

B．His own illness.

C．The changing of his life.

D．A sick old man’s experience.小题4:According to the writer, traditional means of communication will never disappear because ________.

A．they are convenient and popular though they are slow

B．they help to keep the friendly relationship between people

C．most people cannot keep up with the development of technology

D．modern means of communication does too much harm小题5:How did the sick old man keep in touch with his family members?

A．With the help of his computer.

B．By writing letters with his pen.

C．By making telephone calls.

D．By visiting them regularly.

（）不属于公安机关的职权。

A.决定逮捕

B.执行逮捕

C.刑事拘留

D.行政拘留

下图中图A表示玉米种子在黑暗中萌发时，测得的胚芽鞘与幼根中各部分生长素含量的变化情况；图B表示切除玉米胚芽鞘顶端后，在其左侧放置含有不同浓度生长素的琼脂块，将实验装置在黑暗中放置12小时后观察到的实验现象；图C表示琼脂块中不同生长素浓度与胚芽鞘向右弯曲的角度之间的关系曲线。请据图分析回答：

促进根尖部位生长的植物激素除生长素外，还有（），其作用是（）。