The moon is___________the earth .

A．as big as forty-nine times

B．forty-nine times bigger than

C．as big as one-third

D．one-third the size of

旋塞式等压灌装机的灌装过程（）。

A.充气等压；排气卸压；进液回气；排除余液

B.充气等压；进液回气；排气卸压；排除余液

C.进液回气；充气等压；排气卸压；排除余液

D.排气卸压；充气等压；进液回气；排除余液