【单选题】凡造林面积在( )以上的,按片林统计,其它按四旁造林统计。
【简答题】已知图4.57所示电路中,NR为无源线性网络,当us=2V,is=1A时,i=5A;us=4V,isS=一2A时,u=24V;求当uS=6V,is=2A时的电压u。
【简答题】Like most English children, I learned foreign languages at 36. When I made my first visit 37 the Unites States, I was 38 I could have a nice easy holiday without any 39 problem. But how 40 I was! At t...
【单选题】Do you remember _____ just now? [ ]
C.
what did the teacher say
【单选题】The students ______ what the teacher says.