问题 选择题

为了尽量减少农田污染,你认为应该(                 )

A.多施用化肥和生长激素

B.尽可能使用无害化处理的农家肥

C.不施用任何肥料

D.尽可能使用高效毒性强的农药

答案

答案:B

解:A、化肥使用过多,会造成烧根现象,也易造成土壤板结,不利于植物的生长,生长激素的残留对人体有害,不符合题意.

B、农家肥同化肥相比,具有来源广、养分全、肥效持久、能够改良土壤和成本低等优点,但农家肥中有很多病菌和虫卵,如果不进行处理,就会造成污染,进而传播疾病,给人畜的健康带来严重危害,因此要尽可能的使用经无害化处理的农家肥.符合题意.

C、化肥是经过严格配方,含一定无机盐的化学肥料,最大的好处就是肥效快,因此适当的时候可以使用部分的化肥,以促进植物的快速生长.不符合题意.

D、在给农作物灭虫时应尽可能的不用高效毒性强的农药,因为一是高效,会大量消灭害虫,可能会破坏生物的多样性,进而破坏生态平衡.二是毒性强,残留严重,会对人体造成严重危害.不符合题意.

故选:B

点评:关键是了解化肥和农家肥的知识,比较其优缺点,结合题意,即可解答.

阅读理解

Li Jun
China
I dislike rain. It seems that even though you have an umbrella, you can’t protect yourself from the rain. Whenever it rains, I’ll get wet so I have to go back home to change my clothes. It is just uncomfortable.
Kate
Ukraine
I love spring. In spring, it starts to get warm. I enjoy going outside without a coat. And it never gets too hot in spring. I dislike the hot summer because we can’t find a place to get away from the hot sun at all.
Lucy
America
I like rainy days. When it is raining, I can read my favorite book in a warm bed. I also like listening to the sound of rain. It makes me relaxed.
Simon
Russia
My favorite season is summer. There are two reasons why I like it. First, I was born in summer, Second, it’s hot in summer, and I like to swim in the sea and sunbathe on the beach.
小题1:___________ doesn’t like the rainy weather.
A.KateB.LucyC.Li JunD.Simon
小题2:The child from __________enjoys the rain sound and __________ likes hot days best.
A.Ukraine, Li JunB.China, LucyC.America, SimonD.Russia, Kate
小题3: The  underlined word “sunbathe” means “_________” in Chinese.
A.游泳B.晒太阳C.打排球D.洗淋浴
小题4:Which of the following is WRONG?
A.Li Jun thinks hot days make him uncomfortable.
B.Kate enjoys going outside without a coat in warm weather.
C.Lucy likes reading in a warm bed on a rainy day.
D.Simon likes to swim in the sea and sunbathe on the beach on hot days.
小题5:The form wants to tell us ______________.
A.children all over the world like rainy days
B.different children like different kinds of weather
C.different children have different ways to study
D.what children usually do in different kinds of weather
问答题