搅拌站实验室在试配过程中应考虑混凝土搅拌及运输过程中混凝土热量的散失。当不满足要求时

题型:单项选择题

问题:

搅拌站实验室在试配过程中应考虑混凝土搅拌及运输过程中混凝土热量的散失。当不满足要求时应及时采取措施;混凝土罐车需采用保温材料包裹,且罐车出站后应尽快到达现场,尽量防止混凝土的热量损失;现场施工人员在混凝土浇筑过程中密切观测罐车中混凝土的温度,以保证混凝土出罐温度不低于()℃;混凝土搅拌车到场后应合理安排浇筑顺序,每车混凝土不得停滞时间过长。

A.5

B.10

C.15

D.18

考点:混凝土试验员考试混凝土专业基础知识混凝土专业基础知识题库
题型:单项选择题

如果一个人配了合适的眼镜,但他在日常生活中大部分时间并不戴用,他的日常生活视力相当于他的()。

A.最好矫正视力

B.裸眼视力

C.平时所戴眼镜的矫正视力

D.戴镜后的视力

E.裸眼的近视力

题型:单项选择题

Aedes albopictus, a variety of mosquito that has recently established itself in the southeastern United States, is less widespread than the indigenous swamp mosquito. Both the swamp mosquito and A. albopictus can carry viruses that are sometimes fatal to humans, but A. albopictus is a greater danger to public health.
Each of the following, if tree, provides additional information that strengthens the judgment given about the danger to public health EXCEPT:

A.Unlike the swamp mosquito, A. albopictus originated in Asia, and larvae of it were not observed in the United States before the mid-1980’s.

B.Unlike the swamp mosquito, A. albopictus tends to spend most of its adult life near human habitation.

C.Unlike swamp mosquito larvae, A. albopictus larvae survive in flower pots, tin cans, and many small household objects that hold a little water.

D.In comparison with the swamp mosquito, A. albopictus hosts a much wider variety of viruses known to cause serious diseases in humans.

E.(E) A. albopictus seeks out a much wider range of animal hosts than does the swamp mosquito, and it is more likely to bite humans.

题型:单项选择题

主管房地产开发部门应当根据( )对房地产开发企业核定资质等级。

A.房地产开发企业的资产

B.房地产开发企业员工素质

C.房地产开发企业领导素质

D.专业技术人员

E.开发经营业绩

题型:单项选择题

某l0kV开关柜的最大负荷为2×1600KvA变压器,如图1所示l0kV母线最大三相短路电流为8kA,试对此开关柜及配套设备选择的问题分析判断。

此开关柜安装在户内,请指出此开关柜的防护等级应选下列哪一种?

A.IP5 X;

B.IP4X;

C.IP3 X;

D.IP2X。

题型:单项选择题

血清氯在机体内含量是()

A.80~90mmol/L

B.95~105mmol/L

C.110~120mmol/L

D.125~135mmol/L

E.135~145mmol/L

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