问题
单项选择题
半硬态的锡青铜带QSn6.5-0.1-Y2的抗拉强度和延伸率应为（）。
A.σb=440~569N/mm2，δ10≥10％
B.σb=539~687N/mm2，δ10≥8％
C.σb≥667N/mm2，δ10≥2％
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
半硬态的锡青铜带QSn6.5-0.1-Y2的抗拉强度和延伸率应为（）。
A.σb=440~569N/mm2，δ10≥10％
B.σb=539~687N/mm2，δ10≥8％
C.σb≥667N/mm2，δ10≥2％
参考答案：A
| 选择方框内所给词组，用其正确形式完成句子。 | |
| |
| 1. What's the largest English-speaking country _______ the world? 2. _______ home after school, Linda met her best friend, James. 3. In order to _______, Johnson quitted(辞掉)his job to visit many places and take pictures. 4. It is getting harder and harder to _______ the hot weather in Beijing. 5. I _______ how big the Ayers Rock was, while we were taking a helicopter tour over the rock. 6. Chimpanzees(黑猩猩)and common monkeys are different from each other _______, such as their brains, ways of acting and so on. 7. His dormitory is always in a mess, _______ empty cans and dirty socks. 8. The Potala Palace is _______ the wisdom and power(智慧和力量)of the Tibetan people. 9. Many coal labours _______ work more than 18 hours a day by their bosses in 1930s in China. That was definitely illegal(非法的). 10. If you _______ the wonderful view over the sea from this window, I am sure you will buy this house without hesitation(犹豫). |