问题
单项选择题 A1/A2型题
飞行员膳食中，由脂肪提供能量的适宜比例为（）。
A.10％～15％
B.15％～20％
C.25％～30％.
D.20％～25％
E.20％～35％
答案
参考答案：D
解析：飞行员膳食中脂肪提供能量的适宜比例为20％～25％。
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飞行员膳食中，由脂肪提供能量的适宜比例为（）。
A.10％～15％
B.15％～20％
C.25％～30％.
D.20％～25％
E.20％～35％
参考答案：D
解析：飞行员膳食中脂肪提供能量的适宜比例为20％～25％。
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 Without plants, people could not live. We eat plants.___ 小题1:___ And we need plans for another reason : We need them because they are beautiful. ___小题2:___ Imagine no flowers with their sweet smells, their beautiful colors and their lovely shapes. Imagine, when the winds blows, we are not able to hear the leaves of the trees or watch the branches swing from side to side. ___小题3:___ That is why we have parks full of trees and flowers. That is why people always like houses with room for some grass and a garden. Do you talk to your plants? __小题4:__ Peter Tompkins and Christopher Bird, writers of a book called The Secret of plants, tell of an experiment in which two seeds were planted in different places. While the plants were growing, one plant was given love and hopeful ideas. ___小题5:___ Under the earth it had more and longer roots; above the earth, if had a thicker stem and more leaves.
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