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【判断题】
对退火低碳钢进行拉伸试验,会出现载荷不增加而试样继续伸长的现象,这一现象为屈服。A.
正确
B.
错误
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【单选题】—When ______ this activity________ every year? —It is held in spring every year. [ ]
A.
is; happened
B.
does; take place
C.
is; happening
D.
is ; taken place
【简答题】A．He went to Wimbledon every year. B．He went to Wimbledon every year to watch the international tennis s there. C．He always watched tennis s held in Wimbledon. D．He had never played tennis in ...
【单选题】在清漆施工过程中,错误的是哪项?
A.
应按标准要求进行添加固化剂、稀释剂
B.
建议喷涂2-2.5遍,选用HVLP1.3-1.4mm喷枪
C.
高浓清漆可以采用雾-湿喷法,中浓清漆可以采用两遍湿喷
D.
烘烤温度建议75-80度10-15分钟,这样能提高工作效率
【单选题】Three million tons of coal ______ every year in the city.
A.
is exploited
B.
are exploited
C.
had exploited
D.
have exploited
【单选题】腻子打磨施工过程错误的是哪项?
A.
检查腻子是否干燥应检查薄的区域
B.
第一阶段是粗整平,7#配合80-120号砂纸
C.
第二阶段是细整平,7#配合180-240号砂纸,要求原子灰平整、光滑,符合中涂漆施工的要求
D.
每道打磨都需要涂指示层,当出现砂眼时,应用填眼灰进行快速填补研磨后喷涂中涂漆
【单选题】在水性漆施工过程中,错误的是哪项?
A.
喷涂前,若发现漆膜已磨穿至裸铁,需喷涂侵蚀底漆以保证附着力
B.
水性漆表面出现脏点时,必须用水磨去除,再喷涂清漆
C.
喷涂银粉漆时,最后需要喷涂效果层
D.
层间闪干时采用吹风筒吹至哑光后才能喷涂下一层
【简答题】A．Every year in March. B．Every other year, C．From two to three weeks. D．The winter of 1925.
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