感知电流是指能使人感觉到的最小电流,对于工频交流为()。A.0.1mA B.0.5

题型:单项选择题

问题:

感知电流是指能使人感觉到的最小电流,对于工频交流为()。

A.0.1mA

B.0.5mA

C.1mA

D.5mA

考点:焊工初级焊工初级焊工模拟题
题型:单项选择题

同等数量的黑白围棋子,可以组成具有凌厉的攻势的胜局,也可以组成破绽百出的败局。这一事例说明(  )

A.联系是普遍的、客观的

B.质变和量变是事物发展的两种状态

C.质变并不都是量变的结果

D.事物的成分在结构和排列顺序上的变化,也能引起质变

题型:单项选择题

在企业中,既存在物流顾问部门,又存在物流业务部门,并且它们均受物流(总)部的管理,顾问部门对业务部门没有管理和指挥权,只负责对物流(总)部提供决策性的建议,运作部门受物流(总)部的直接指挥,这样一种物流组织结构属于()物流组织结构()

A.顾问式

B.直线式

C.直线顾问式

D.矩阵式

题型:单项选择题

长度的基本单位是 ______,符号是 ______,测量长度常用的工具是 ______.时间的基本单位是 ______,符号是 ______,测量时间常用的工具是 ______.

题型:单项选择题

Calculator is (66) for performing arithmetic operations, but that requires human intervention to alter its stored program, if any, and to initiate each operation or sequence of operations. A calculator performs some of the functions of a computer, but usually operates only with frequent human intervention.

Microcomputer’s processing unit consists of one or more microprocessors, and includes storage and input-output (67) . Personal computer primarily intended for (68) use by an individual. (69) computer can be hand-carried for use in more than one location. Minicomputer is functionally intermediate between a microcomputer and a mainframe. And supercomputer has the highest processing speeds available at a given time for (70) scientific and engineering problems.

(69)处填()。

A.Carried

B.Traveling

C.Portable

D.Walking

题型:单项选择题

微量元素()是许多酶的成分,以碳酸酐酶最重要。

A.铁(FE.

B.铜(Cu)

C.锌(Zn)

D.锰(Mn)

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