问题
选择题
“_____?” “Yes, please. I like apples.”
A．Do you like one
B．May I have one
C．Will you please have one
D．Would you like one
答案
答案：D
搜题请搜索小程序“爱下问搜题”
“_____?” “Yes, please. I like apples.”
A．Do you like one
B．May I have one
C．Will you please have one
D．Would you like one
答案：D
角的光滑平行的金属轨道，上端接有可变电阻R，下端足够长，空间有垂直轨道平面的匀强磁场B，一根质量为m的金属杆MN从轨道上由静止滑下，经过足够长的时间后，流经金属棒的电流达到最大，金属杆做匀速运动，金属杆和轨道电阻均不计。则（ ）