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A. Travel on his own B. Travel with his friends C. work full time at a restaurant D. Do a part-time job at a restaurant 2. A. 90 cents B. 1.50 dollars C. 50 cents D. 1.15 dollars. 3. A. He isn ’ t interested in visiting museums. B. He doesn't have time to visit are museums often. C. He isn ’ t keen on art at all. D. He isn ’ t such an art lover as he says he is. 4. A. He was too busy to call the woman. B. He called the woman but she was out. C. He tried calling the woman but was not successful . D. He didn't know that he should have called the woman last night. 5. A. after his class is over B. after 3 o ’ clock C. after class tomorrow D. sometime tomorrow afternoon 6. A. only the manager can handle new accounts B. The manager is away from the bank. C. The woman can ’ t open new accounts now. D. The woman is too busy to open an account for the man. 7. A. buy a new suit at Sears ’ B. go to Sears ’ with the woman C. Watch the ad on TV D. Wait until the sale is over 8. A. They don't really need to buy any groceries. B. They have no time to go shopping at the supermarket. C. They should wait for a better deal. D. They should buy some groceries at the supermarket. 9. A. 10:00 B. 9:15 C. 8:45 D. 9:50 10. A. If something seems far better than can be expected, it is probably no good. B. If something seems far better than can be expected, grab it while you can. C. If something seems far better than can be expected, it must be no good. D. If something seems far better tan can be expected, it must be very good.
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【简答题】假定定时器 T1 工作在方式 2 ,单片机的振荡频率为 3MHz ,则最大的定时时间为 _______
【多选题】关于高分子溶液的正确叙述为
A.
高分子化合物的溶解由有限溶胀与无限溶胀两个过程完成
B.
高分子化合物一般在冷水中较热水中更易溶胀,故配制高分子溶液不应加热
C.
无限溶胀一般相当缓慢,搅拌或加热可加速完成
D.
改变温度或pH可使高分子溶液产生胶凝,形成凝胶
E.
高分子溶液的胶凝是一个不可逆过程
【判断题】用矩形的倒角绘制和用倒角工具绘制是一样。
A.
正确
B.
错误
【判断题】若金属片为环状吊片时,考虑一级近似,可以认为脱离力为表面张力系数乘上脱离表面的周长,即 F=α·π(D 1 十D 2 )
A.
正确
B.
错误
【判断题】常见的铸造合金中,铸钢的收缩较大。
A.
正确
B.
错误
【简答题】假定定时器1工作在方式2,单片机的振荡频率为6MHz,则最大的定时时间为()。
【简答题】简述工业机器人的应用场合。
【简答题】假定定时器 1 工作在方式 2 ,单片机的振荡频率为 3MHZ ,则最大的定时时间为 __ _______
【单选题】期间费用包括销售费用、管理费用和()
A.
财务费用
B.
直接费用
C.
间接费用
D.
直接工资
【单选题】可用于室上性和室性心律失常的药物是:
A.
普鲁卡因胺
B.
奎尼丁
C.
两者均是
D.
两者均不是
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