问题
解答题
小东量得一棵树的树干最粗处的周长是125.6cm，该树干最粗处横截面的面积是多少？
答案
125.6÷3.14÷2=20（厘米），
3.14×202，
=3.14×400，
=1256（平方厘米）；
答：该树干最粗处横截面的面积是1256平方厘米．
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小东量得一棵树的树干最粗处的周长是125.6cm，该树干最粗处横截面的面积是多少？
125.6÷3.14÷2=20（厘米），
3.14×202，
=3.14×400，
=1256（平方厘米）；
答：该树干最粗处横截面的面积是1256平方厘米．
阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。 In the United States there was an unusual tale telling of the daughter of a mechanic （技工）. One day while walking along the bank of a lake, the girl 36 to see 20 eggs laid by a wild goose. After some time the girl 37 the mother would not return to her eggs and she 38 to take them home. There she carefully 39 the eggs in the heat of a lamp. Several days 40 the eggs broke and the baby geese came into the 41 . Geese are known to take the first living thing they see as their mother. 42 , to these young geese, the girl was their mother. As they 43 , the girl was able to 44 her birds to run across the grass, but she could not teach them to 45 . The girl became increasingly worried about this, both when 46 and in her dreams. Later, she had an 47 : She would pilot a plane to guide them in 48 . She asked her father for a plane and he assembled（组装）a small aircraft for her. Caring about 49 safety, the father decided to pilot the plane himself. However, the birds did not 50 or follow him, and 51 slept in the grass. One day, the girl 52 into the plane, started it and soon left the 53 . Seeing their mother take to the air, the birds 54 flapped（拍打）their wings and 55 . She flew the plane freely in the sky, her young birds following.
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