手拉葫芦的起重高度最高不超过()m。 A.3 B.4 C.5 D.6

题型:单项选择题

问题:

手拉葫芦的起重高度最高不超过()m。

A.3

B.4

C.5

D.6

考点:起重机操作工考试起重机操作工综合练习起重机操作工综合练习题库
题型:单项选择题

六.单词拼写(每小题10 分,共10分)

66. The proud woman said she would rather s__________ than beg for food.

67. Kitty has been wondering what is in the box and finally, she opened it with c_____________.

68. The bank-note can’t be f__________. It must be genuine.

69. The robbers bit them v________. They couldn’t bear it any more and decided to fight back.

70. There are seven c____________ and four oceans in the world.

71. The whole family will _____________(聚集) for a big meal on the Eve of the New Year.

72. To have a ________________(平衡) diet is really important to everybody.

73. Slowly it turned its face and _________________ (盯着) straight at Mrs. Cousin.

74. There is no ghost in the world at all, and it only _______ (存在) in the minds of some people.

75. I was living in the _________ (附近的) town of Genzi , which is famous for Licthi (荔枝)。

题型:单项选择题

根据《中华人民共和国劳动法》的规定,用人单位由于生产经营需要,经与工会和劳动者协商后可以延长工作时间;因特殊原因需要延长工作时间的,在保证劳动者身体健康的条件下,每日可以延长的最长时间为()。

A.1小时

B.2小时

C.3小时

D.4小时

题型:单项选择题

完全竞争市场上企业产量决策的基本原则是()。

A.边际成本等于平均成本

B.边际成本等于边际收益

C.平均成本等于边际收益

D.平均成本等于平均收益

题型:单项选择题

三相异步电动机在电动状态下运行时,其转差率S约为()。

A.n=0;s=1

B.0<S<1

C.0.004~0.007

D.0.04~0.07

题型:单项选择题

焊接缸体时,应将缸体在加热炉内加热均匀,加热温度一般在()。

A.600-650℃

B.650-700℃

C.700-750℃

D.550-600℃

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