问题
单项选择题
受拉压变形的杆件，各截面上的应力为（）
A．正应力
B．扭应力
C．剪应力
D．弯应力
答案
参考答案：A
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受拉压变形的杆件，各截面上的应力为（）
A．正应力
B．扭应力
C．剪应力
D．弯应力
参考答案：A
完型填空（15分） We do shopping (购物)on Sunday. I often go to the supermarket (超市)with my mother 1 Sunday morning 2 car. Father likes fruit very much.We buy some red apples for him. Mother likes yellow bananas, 3 they’re green.“ 4 ! The strawberries are very nice, mum. Do you like 5 ?” I 6 to mum. “Yes, I like strawberries very much.” Mother buys some 7 herself. The oranges are very nice. Mother buys some for 8 . I like oranges very much. We 9 some vegetables. The vegetables in the 10 are very good. We buy some tomatoes, carrots and broccoli. I 11 like broccoli, but my parents like 12 . I like carrots very much. We buy 13 of carrots. 14 shopping, mother and I have some French fries, milk and ice cream. And then we go back 15 with the fruit and vegetables.
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