阀门按原理、作用、结构可分为()等。A.闸阀 B.截止阀 C.球阀 D.安全阀 E.

题型:多项选择题

问题:

阀门按原理、作用、结构可分为()等。

A.闸阀

B.截止阀

C.球阀

D.安全阀

E.法差式阀门

考点:矿井防尘工矿井防尘工题库
题型:多项选择题

第四部分(词汇,语法和写作)

第一节:根据所给中文意思或首字母,用Unit1-3所学单词填空,使句子意思通顺,语法正确。(10分)

61 But he became inspired when he thought about helping ordinary people e________ to cholera.

62 In two particular streets, the cholera outbreak was so ________(严重的) that more than 500 people died in ten days.

63 They had been given free beer and so had not drunk the water from the pump. It seemed that the water was to b_______.

64 His friends were enthusiastic and encouraged him to punish his ideas, but Copernicus was ________ (谨慎的).

65 It is a pity that the industrial cities built in the nineteenth century do not a________ visitors.

66 For historical ________ (建筑) you have to go to older but smaller towns built by the Romans.

67 There followed St Paul’s Cathedral built after the terrible fire of London in 1666. It looked s________ when first built!

68 I still cannot believe that I am taking up this prize that I won last year. I have to remind myself __________ (不断地) that I am really in AD3008.

69 At first my new surroundings were difficult to _______(忍受)

70 Nothing is wasted, and everything, even plastic bags, is r_______.

题型:多项选择题

现代企业物流质量管理就包括两个方面的内容:物流工作质量和物流工程质量

题型:多项选择题

回力卡环能减小游离缺失末端基牙扭力的原因是()。

A.采用远中合支托

B.合支托不与鞍基直接相连

C.卡臂长,弹性大

D.有间接固位作用

E.受力时卡臂尖离开基牙

题型:多项选择题

根据《高层民用建筑设计防火规范》的规定,防烟楼梯间及其前室的门均应为(),并应向疏散方向开启

A.甲级防火门

B.乙级防火门

C.丙级防火门

D.木质防火门

题型:多项选择题

下列哪些可判断渣口堵()

A.下渣量减少

B.CH4含量下降

C.气化炉压差增大

D.捞渣机电流大

更多题库