问题
选择题
Our country is _______ to yours in that they both have several time zones.
A．same
B．similar
C．alike
D．familiar
答案
答案：B
搜题请搜索小程序“爱下问搜题”
Our country is _______ to yours in that they both have several time zones.
A．same
B．similar
C．alike
D．familiar
答案：B
，转子上线圈共200匝，总电阻为8
，每匝线圈的面积为30cm2。现使摇把以每秒2转摇动，则
，则每个发光二极管每次发光的时间是多少?