问题
选择题
值日生每天值完日后，总是先把每一列最前和最后的课桌摆好，然后再依次摆中间的课桌，很快就能把课桌摆得整整齐齐，他们这样做的道理是（ ）
A．两点之间，线段最短
B．两点确定一条直线
C．两点的距离最短
D．以上说法都不对
答案
把每一列最前和最后的课桌看做两个点，
∴这样做的道理是：两点确定一条直线．
故选B．
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值日生每天值完日后，总是先把每一列最前和最后的课桌摆好，然后再依次摆中间的课桌，很快就能把课桌摆得整整齐齐，他们这样做的道理是（ ）
A．两点之间，线段最短
B．两点确定一条直线
C．两点的距离最短
D．以上说法都不对
把每一列最前和最后的课桌看做两个点，
∴这样做的道理是：两点确定一条直线．
故选B．
| 用方框中所给单词的适当形式填空，使短文完整正确。（每个单词限用一次） | |
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| As we all know, we are what we eat. So it's very l for us to have healthy eating habits.2 , bad eating habits are still very common among us students. Some of us often go to school without3 ; some like to have snacks; some others'are particular(挑剔的) about food; and still some eat ordrink 4 . All these bad habits will surely be 5 ,our health. To keep 6 , we should have different 7 of healthy diets, which 8 _ include proper amounts of fish, meat, vegetables, fruit as well as main food. Besides, we'd better have meals regularly(右规律地).In my opinion, we should try to 9 healthy eating habits to build up a strong body. Only in this way can we have enough10 to study better. |