1、 In a questionnaire, respondents are asked to mark their gender as male or female. Gender is an example of the（ ）
答案: B.nominal scale
2、 The nominal scale of measurement has the properties of the（ ）.
答案: D.None of these alternatives is correct.
3、 The scale of measurement that is used to rank order the observation for a variable is called the（ ）.
答案: B.
2020-09-14到2020-12-31
1、 A positive charge is moving close to a spherical surface in space. The magnetic flux through the spherical surface is
A:positive.
B:negative.
C:zero.
D: variable.
答案: zero.
2、 A planar rectangular coil of dimensions 
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2020-12-09到2021-07-26
每5天更新一次
1、 Which of the following is a vector quantity:
A:speed
B:time
C:acceleration
D:mass
答案: acceleration
2、 In right handed coordinate system which axis is considered to be positive?
A:The thumb is z-axis, fingers curled from y-axis to x-axis
B:The thumb is x-axis, fingers curled from z-axis to y-axis