问题
选择题
If you get the flu, you should ______________ for a few days.[ ]
A. watch TV
B. stay in bed
C. drink cola
答案
答案：B
搜题请搜索小程序“爱下问搜题”
If you get the flu, you should ______________ for a few days.[ ]
A. watch TV
B. stay in bed
C. drink cola
答案：B
sin100πt （V）的 正弦交流电源，图中电流表内阻不计．副线圈接入“110V，60W”灯泡一只，且灯光正常发光．下列说法正确的是（ ）
/22 A