—David left, do you know?
—No, which team is he _____ now? [ ]
A. to
B. off
C. out
D. in
答案:D
在太阳内部,_____在超高温条件下发生_____,释放出巨大的核能,可以说太阳核心每时每刻都发生氢弹爆炸.
小白菜在烹调过程中最易损失的营养素为().
A.维生素A
B.维生素E
C.维生素D
D.维生素B1
E.维生素C