问题
单项选择题
拉伸试验是在常温下给试样缓慢施加()载荷,引起试样变形和断裂的试验过程
A.横向
B.轴向
C.5度方向
答案
参考答案:B
拉伸试验是在常温下给试样缓慢施加()载荷,引起试样变形和断裂的试验过程
A.横向
B.轴向
C.5度方向
参考答案:B
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。 How to keep healthy? It’s easy for us to catch a cold in winter and spring because the weather changes a lot in spring and it is too cold in winter. But if we take care in our life, all of us can keep healthy without any cold. 1 . This will stop germs(细菌,病毒) passing from one person to another. When you finish your work or before you eat, you’d better wash your hands. 2 . Use a tissue(纸巾), and then throw it into dustbins at once. When others around you are coughing, I advise you to turn your head away from the people so that their viruses won’t reach you. Get more fresh air. Germs like staying around in dry and warm rooms. 3 . Don’t stay too long in the places with too many people. If flu is going round house or school, you should try to stay away from those who are ill. 4 Boil your toothbrush for about a minute. This kills germs . 5 . If you have used the toothbrush for three months or so, throw it away and buy a new one.
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