字母“p”在显微镜视野中的物像是 [ ]
A．q
B．d
C．p
D．b
B
--- Could you tell us ______ ?
--- About two weeks.
A．how often are you going to be away
B．how often we are going to be away
C．how long are we going to be away
D．how long we are going to be away
什么情况下ECU除了进行同步喷射控制外，还需进行异步喷射控制？
