A:﹣1<x<0
B:﹣1<x<1
C:x<﹣1或0<x<1
D:﹣1<x<0或x>1
There are _____months in a year. _____ month is December.
在显微镜的使用中,将低倍镜换成高倍镜后,视野中观察到的变化是