定義旋轉(zhuǎn)陽極X線管的代表容量時(shí)，整流方式規(guī)定為
D
暫無解析
()Look!Thecatis_______.
Lucy_____(look)likeherfather.
Thereare_____studentsinourclass.Thatis19boysand21girls。
Howmany_____(hour)arethereinaday?
Linglingisin__________.
