读地球自转线速度随纬度变化图(下左图)和地球公转线速度变化图(下右图),回答以下问题。左图中P点的纬度和右图中N点对应的月份分别是( )
当地球公转线速度为M时( )
____the sketch of Xiao Shenyang made a _____has been known to us all.
That Xiao Shenyang was elected_____model worker of May Day caused ____enthusiastic discussion in China.
----What do you know the _____ of are the pig influenza in humans? ---- usually similar to regular human seasonal influenza .
People go out with masks,________.
The dead rate is _____ pigs and recovery usually ______ within 7-10 days. A low in; occursB.rich in;happens C.high in; came aboutD.poor in;took place