A: will be flying
B: will fly
C: have been flying
D: have flown
物理课外兴趣小组利用图中所示的电路图进行一些电学实验,其中电阻R有20Ω、15Ω、10Ω、5Ω、1Ω五个供选择,滑动变阻器的规格是“10Ω 1A”,电源电压5V保持不变.
____ he ____ on his coat and leave home without a word?
在函数y=2x图象上的点是( )