问题
单项选择题
在焊接热影响区中,具有过热组织或晶粒显著粗大的区域叫做()。
A.熔合区
B.过热区
C.正火区
D.球状光球光体区
答案
参考答案:B
在焊接热影响区中,具有过热组织或晶粒显著粗大的区域叫做()。
A.熔合区
B.过热区
C.正火区
D.球状光球光体区
参考答案:B
根据短文意思,用方框中所给单词的适当形式填空。(有两项多余) | |
he 3_ a shower and 4 his breakfast .What a funny time to make breakfast ?After breakfast he 5 his guitar ,then 6 his clothes and 7 to work at 19:00. He 8 well .People in the pub 9 to 10 him very much. |