具有较明显季节性和周期性流行特点的牛传染病是（） A.牛出血性败血病 B.牛流行热

阅读理解。

     Boys and girls love to watch TV. Some children spend six hours a day in school and four to six hours

a day in front of a TV set. Some children even watch TV for eight or more hours on Saturday. TV

programmes are like books or films. A child can learn bad things from some of them and good things from

others. Some programmes help children to know the news from other part of the world. Some programmes

show people and places from other countries or other times in history. With TV a child doesn't need to go to

the zoo to see animals or to the sea to see a ship. Boys and girls can see a film, a play or a basketball match

at home. Some programmes can teach children how to cook or how to use tools. It's interesting to watch

TV, but it is also interesting to read a book or to visit friends.

1.Children often watch TV for _____ a day. [ ]

A. four hours

B. four hours to six hours

C. six hours

D. eight or more hours

2. Children can learn _____ things from TV programmes. [ ]

A. good

B. good and bad

C. bad

D. good or bad

3. A child can know _____ from TV programmes. [ ]

A. the news of the world

B. people in the other countries

C. history of other countries

D. all of the above

4. According to the passage, children watch many things except _____.[ ]

A. dogs

B. matches

C. plays

D. books

5. TV can be _____, too. [ ]

A. teachers

B. doctors

C. workers

D. students

因情志所伤引起的腹痛，和情绪关系密切可能是下列哪种疼痛（）

A.刺痛

B.胀痛

C.灼痛

D.隐痛

E.冷痛

（7分）根据植物体有关生理作用回答下列问题：移栽树苗时，根部总要带一个坨，主要目的是保护根尖成熟区的            ，从而保证移栽后树苗对             和无机盐的吸收；农业生产上，农作物应当合理密植，才能使产量提高，这利用了植物的          作用原理；森林覆盖率高的地区降雨多，在炎热的夏天草坪可使周围气温降低，主要原因是植物能进行                 作用，使大气湿度增大；农田土壤板结或水淹时，植物受害的原因是根的                作用受到抑制，因而栽种植物时要及时疏松土壤和防涝排涝；用糖“凉拌黄瓜”盘中出现许多水，这是因为糖溶解于水，使得黄瓜细胞周围的溶液溶度        （大于或小于）细胞内的细胞液浓度，导致细胞         （吸水或失水）而引起的。

有人说：“6g硫和10g氧气化合可生成16g二氧化硫”．请你依据质量守恒定律分析，这种说法对吗？为什么？

胃痛与痞满常相兼出现。