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【简答题】
阅读理解。 When my brother and I returned home from school the other day, my mother and my sister were waiting for us there. I could see by their faces that they were really excited about something. But I could not guess what it was. Then they told us my father had rung from the office to say that there was a tennis match in town and that he would take us all there as soon as he finished work. 'Isn't that a surprise?' said my mother. 'We don't have to cook the dinner now. Your father says that we can have a meal when we get there.' 'That's a good idea!' said my brother. Then we began to tell each other to hurry up and get ready. 根据短文内容判断正(T)误(F)。 (     )1. The mother and the sister were waiting for them to return. (     )2. The father works at home. (     )3. The four of them would go to watch a match in town. (     )4. The family would have supper in town. (     )5. The whole family enjoyed going out.
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参考答案:
举一反三
【简答题】钢材在 250oC 左右时抗拉强度略有提高,塑性却降低的现象称为 现象。
【简答题】填空(2.5分) 钢材在250oC左右时抗拉强度略有提高,塑性却降低的现象称为____现象。
【判断题】n 位的二进制编码器输出为 n 个 。
A.
正确
B.
错误
【单选题】钢材在250oC左右时抗拉强度略有提高,塑性却降低的现象称为( )现象。
A.
冷脆
B.
热脆
C.
蓝脆
D.
徐变
【简答题】钢材在250oC左右时抗拉强度略有提高,塑性却降低的现象称为____现象。 简答题
【判断题】n位的二进制编码器输出为n个。
A.
正确
B.
错误
【判断题】洛氏硬度值是根据丫头压入材料的深度来决定的
A.
正确
B.
错误
【单选题】一个输出为n位代码的二进制编码器,可以对 个输入信号进行编码
A.
2 n
B.
2*n
C.
n
【判断题】钢材在250oC左右时抗拉强度略有提高,塑性却降低的现象称为 蓝脆 现象。( )
A.
正确
B.
错误
【单选题】一个输出为n位代码的二进制编码器,可以对( )个输入信号进行编码。
A.
2n
B.
2的n次方
C.
n
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