绞车司机在作业前应送上()示警,发出开车信号。 A.红灯 B.黄灯 C.蓝灯 D.白

题型:单项选择题

问题:

绞车司机在作业前应送上()示警,发出开车信号。

A.红灯

B.黄灯

C.蓝灯

D.白灯

考点:煤炭矿山职业技能鉴定考试小绞车耙斗机考试小绞车耙斗机考试题库
题型:单项选择题

在检查锚杆安装尺寸时,孔径大于杆体直径()时,可认为孔径符合要求。

A.10mm

B.15mm

C.20mm

D.25mm

题型:单项选择题

支气管哮喘发作时呼吸形式是

A.间停呼吸

B.呼气性呼吸困难

C.吸气性呼吸困难

D.潮式呼吸

E.混合性呼吸困难

题型:单项选择题

The following questions present a sentence, part of which or all of which is underlined. Beneath the sentence, you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

These questions test correctness and effectiveness of expression. In choosing your answer, follow the requirements of standard written English; that is, pay attention to grammar, choice of words, and sentence construction. Choose the answer that produces the most effective sentence; this answer should be clear and exact, without awkwardness, ambiguity, redundancy, or grammatical error.

Blues musician Paul "Poboy" Smith, born in Tupelo, Mississippi, in 1936, has since 1958 been a fixture on the southern blues scene after the release of his debut album in that year.()

A. Blues musician Paul "Poboy" Smith, born in Tupelo, Mississippi, in 1936, has since 1958 been a fixture on the southern blues scene after the release of his debut album in that year.

B. Being born in 1936 in Tupelo, Mississippi, blues musician Paul "Poboy" Smith released his debut album in 1958 and has been a fixture on the southern blues scene since then.

C. Born in Tupelo, Mississippi, in 1936, blues musician Paul "Poboy" Smith has been a fixture on the southern blues scene since the release of his debut album in 1958.

D. Having been a texture on the southern blues scene since 1958 when he released his debut album, Paul "Poboy" Smith is a blues musician who was born in 1936 in Tupelo, Mississippi.

E. Since the release of his debut album in 1958, blues musician Paul "Poboy" Smith has been a fixture on the southern blues scene; he was born in Tupelo, Mississippi in 1936.

题型:单项选择题

经济效果评价的基本方法包括()评价方法和不确定性评价方法,对同一技术方案必须同时进行。

A.定量分析 

B.定性分析 

C.动态分析 

D.确定性分析

题型:单项选择题

烃类热裂解的一次反应主要有哪几个?烃类热裂解的二次反应主要有哪几个?

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