2003年10月15日9时,由中国自行研制的“神舟五号”飞船载着中国自己培养的宇航员杨利伟升入太空,并在太空遨游21小时,实现了中国几代人的梦想,请问下列哪项不是宇航员必须携带的维持生命的物质( )
A. No.It's on the first floor.
B Thank you.
C. Yes,it is.
D. It's next to my classroom.
—Mum, I have a bad headache. I feel terrible.
—Oh, dear! You must get a cold. You'd better see ___________ after breakfast.