题目内容
plants grow well.
A.Not all B.No all C.Not of all D.No all of
A
Why do plants grow in some places and not in others? Why does some land have so much growing on it, while other land has almost no plants growing on it at all?
To grow, plants need several things. One is warmth. In very cold places almost nothing grows. Plants also need water. In very dry parts of the Earth only a few unusual plants can grow. That’s why dry deserts everywhere are almost not covered by trees or grass.
Plants must also have a place in which to put down their roots and grow. They find it difficult to grow on hard land. The town is built on hard land. The plants here have only the soil (土壤)found between the cracks of the stones to grow in.
Another thing plants must have before they can grow is food.
What will happen if we try to make things grow on the sandy beach? A few plants, such as beach grass, will grow in sand, but most plants won’t. Even if the weather is warm enough and we water the plants each day. Many of them will die because the sand on this beach has almost no food for plants.
【小题1】According to the passage, plants need _____ things to grow well.
A.two | B.three | C.four | D.five |
A.缝隙 | B.表面 | C.夹层 | D.底部 |
A.easy | B.difficult | C.impossible | D.important |
A.there isn’t enough sunlight | B.there is too much water |
C.it is too crowded there | D.it has little food for plants |
A.science | B.history | C.travel | D.math |
If someone is lost in a forest( 森林 ), he needs only study the trees around him carefully to find his way. On this half of the earth, he will find that the side of the tree with the most leaves and branches(树枝 ) is the south side. Also, by checking the tops of the trees, he will find that they lean(倾斜 ) to the south too.
Another sign( 标志物) for him to know where he is going is found in the bark.( 树皮) That is brighter on the south side.The remanining(树桩 ) of a cut tree is also a finder, for its rings can give him another sign. The rings will be thinner on the south side and thicker on the north side.
One more sign: some very small plants grow at the foot of a tree and they point to the north.
【小题1】 The passage is mainly about __________.
how to find a big tree if one is lost in the forest.
How to cut down trees in the forest
How to find the direction(方向 )in the forest
How to grow trees in the forest .
【小题2】 From a cut tree we can know that ___________.
A.the direction is written on it |
B.the rings will be thinner on the south side and thicker on the north side |
C.the rings will be thinner on the south |
D.its rings can send messages to you |
A.three | B.four | C.five | D.six |