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【单选题】
Peter was a small boy. He lived with his parents in a small house near some hills. The people there were all poor.One night it was very dry and windy.When everybody was asleep, Peter suddenly heard some noise. It came out from the kitchen (厨房). He got up and walked to the kitchen. He found that the wood beside the stove (火炉) was burning . There was no water tap (水龙头) in the house , so he could not put out (扑灭) the fire . He shouted loudly to wake up everyone in the house. Then he ran out of his house and knocked on the doors of many houses to wake the people up. They all left their houses quickly. At last the fire was put out by the firemen. Many houses were burnt. But nobody was burnt in the fire. Peter lived with his______.
A.
sisters
B.
brothers
C.
parents
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参考答案:
举一反三
【单选题】钢回火的加热温度在( )以下,因此在回火过程中无组织变化。
A.
Ac 1
B.
Ac 2
C.
A 1
【简答题】在图示的轮系中,已知各齿轮齿数为 Z 1 = 1 , Z 2 =40 , Z ’ 2 =24 , Z 3 =72 , Z ’ 3 =18 , Z 4 =114 ,蜗杆左旋,转向如图示,试求轮系的传动比 i 1H , 并确定输出杆 H 的转向。 3.jpg
【判断题】钢回火的加热温度在1以下,因此,回火过程中无组织变化。
A.
正确
B.
错误
【单选题】下列离子中最易水解的是( )见附件
A.
选项A
B.
选项B
C.
选项C
D.
选项D
【判断题】钢回火的加热温度在A1以下,故回火过程不发生组织变化。
A.
正确
B.
错误
【单选题】在图示所示轮系中,已知各轮齿数分别为z1=60、z2=15、z2'=30、z3=105、z4=35、z5=32。试求传动比i15。 【图片】
A.
12/7
B.
-12/7
C.
7/12
D.
-7/12
【判断题】由于钢回火的加热温度在A1以下,所以淬火钢在回火时没有组织变化。
A.
正确
B.
错误
【单选题】下列离子中最易水解的是( )
A.
Na +
B.
Ca 2+
C.
K +
D.
Al 3+
【判断题】淬火钢回火的加热温度在A1以下,因此,回火过程中无组织变化。
A.
正确
B.
错误
【多选题】成语“人言可畏”,体现了中国人乡村社会的评价机制是?
A.
依赖正式评价
B.
依赖自我评价
C.
依赖外部评价
D.
依赖非正式评价
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