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【简答题】
为什么信息技术教育是个体发展的必然要求?(举例说明)
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【判断题】In the story of Ah, Xiangxue,timeis the connotation of the train.
A.
正确
B.
错误
【单选题】两个正弦电流:i1=15sin(100πt+45°),i2=15sin(200πt-30°),以下说法正确的是( )。
A.
两者的相位差为75°
B.
两者的有效值相等
C.
两者的周期相同
D.
两者的频率相等
【多选题】What is the connotation of virture ethics?
A.
A high-mined person will make the right choice, when facing a moral even.
B.
The purpose of virture ethics is to cultivate the virtuous or high-mined persons.
C.
It helps understand how morality influces the decion-making process in practice.
D.
It requires the medical staff to be of benevolence, sincerity, preciseness and fairness.
【单选题】Which of the following can cover all the connotation of the art of writing?
A.
Calligraphy
B.
penmanship
C.
handwriting
D.
none of them
【判断题】The connotation of the word commerce and business is not the same
A.
正确
B.
错误
【单选题】Which of the following can cover all the connotation of the art of writing?
A.
calligraphy
B.
penmanship
C.
handwriting
D.
none of them
【简答题】有两个同频率的正弦交流电流i1=Im1sin(ωt+120°)Ai2=Im2sin(ωt-120°)A问:哪个电流超前?超前多少度?
【多选题】What's the connotation of Chinese Dream?
A.
country's prosperity
B.
national rejuvenation
C.
people's happiness
【多选题】下列有关光电效应的选项中哪些是正确的( )。
A.
在光的作用下,物体内的电子逸出物体表面、向外发射的现象叫外光电效应
B.
在光的作用下,能够使物体内部产生一定方向的电动势的现象叫光生伏特效应
C.
在光的作用下,电子吸收光子能量从键和状态过度到自由状态,引起物体电阻率的变化,这种现象称为光电导效应
D.
当光子的能量等于逸出功时,逸出的电子初速度为零,此时光子的频率为该物质产生外光电效应的最高频率称为红线频率
【多选题】The connotation of craftsman spirit involves the following key words:
A.
devotion
B.
independent
C.
preciseness
D.
keep improving
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