题干

小明是个爱动脑筋的好孩子,他假期到姥姥家玩时,经常随姥爷下地干活,下面是他和姥爷进行农作物种植后的有关叙述,请你利用所学知识进行判断,其中错误的是(  )

A:播种前要对土壤进行耕和耙,是因为种子萌发需要充足的空气

B:播种时要给土壤施农家肥,主要是为了给植物生长提供有机物

C:播种后要用地膜覆盖,是为了控制温度,有利于种子提早萌发

D:要适时给庄稼松土,是为了给植物根的呼吸作用提供充足的氧气

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答案(点此获取答案解析)

B

同类题4

   As a child, I was really afraid of the dark and of getting lost. These fears were very real and caused me some uncomfortable moments.
   Maybe it was the strange way things looked and sounded in my own room at night that scared me so much. There was never complete darkness, but always a streetlight or passing car lights, which made clothes on the back of a chair take on the shape of a wild animal. Out of the corner of my eye, I saw the curtains seem to move when there was no wind. A very low sound in the floor would seem a hundred times louder than in the day. My imagination (想象) would run wild, and my heart would beat fast. I would lie very still so that the “enemy” would not discover me.
   Another of my childhood fears was that I would get lost, especially on the way home from school. Every morning I got on the school bus right near my home. That was no problem. After school, though, when all the buses were lined up along the street, I was afraid that I would get in the wrong one and be taken to some other strange places. On school or family trips to a park or a museum, I wouldn’t let the leaders out of my sight.
   Perhaps one of the worst fears of all I had as a child was that of not being liked or accepted by others. Being popular was so important to me then, and the fear of not being liked was a serious one.
   One of the processes growing up is being able to realize and overcome our fears. Understanding the things that scared us as children helps us achieve greater success later in life.