儿童伤寒的临床特点是A．年龄越小，症状越不典型 B．起病较急，热型多不规则，少有稽留

阅读理解。

     Nowadays, we can know time very easily．Even a little child may know the time．We always ask

"What time is it?" Then people can tell me the exact time．But before the invention of clocks, it was

very difficult．One way people told the time was by using sundials, but it was impossible to tell the time

on cloudy days or at night．

     The first mechanical(计时)clock was invented in China by Su Sung in 1088．The first clock in

Europe was invented 195 years later, at the end of the 13th century．And in Britain, 67 years later, the

alarm clock was invented in Germany.

     The first watch was invented in Italy in 1462. Early watches were different from today's in two main

ways．First, they only had an hour hand．Second, you could not wear them on your wrist. (手腕)You

had to keep them in your pocket- that's why they were called 'pocket clocks'．

     The first wrist watch came from Switzerland 328 years after the first pocket clock, but nobody bought

them．They did not become popular for a hundred years．

     Digital clocks and watches came from the United States and are the new popular inventions in

time-keeping．Shops all over the world started to sell them in 1971.

1．The underlined sundials in the first paragraph may mean ______． 

A．太阳

B．日冕

C．手表

D．闹钟

2．The first mechanical(计时)clock was invented ______． 

A．in China  

B．in England

C．in America

D．in Germany

3．The first watch was invented ______years later than the first mechanical clock． 

A．195

B．67

C．328

D．374

4．According to the passage, the first wrist watch ______．

A．was invented in Italy in 1462

B．many people liked to buy it

C．was the same as our watches nowadays

D．came from Switzerland 328 years after the first pocket clock

5．This passage may be from a(an)______．  

A．news

B．Ads

C．magazine

D．math book

根据课文和要求，默写出相应的古诗文名句。

（1）东风不与周郎便，________________。（杜牧《赤壁》）

（2）我欲乘风归去，又恐琼楼玉宇，________________。（苏轼《明月几时有》）

（3）________________；处江湖之远则忧其君。（范仲淹《岳阳楼记》）

（4）乡愁是一种抹不掉的记忆。初中阶段你所学过的古诗词中，用家书来写乡愁，表达作者思念家人的一个句子是：________________

“喜羊羊之父”是（）。

A.黄伟明

B.赵崇邦

C.卢永强

D.黄伟健

简答为什么DSS的灵活性是系统开发人员所需要的。

简述SAN干燥系统开车过程。