单项选择题

Why can't astronauts drink water from cups

A．The water would come from the open cups.
B．The water would spill all over their food
C．Crams would float in the cups
D．The cups would float in the air.

<上一题目录下一题>

热门试题

单项选择题

The story does not say this, but from what we have read, we can tell that ______ .

A．you get much hungrier in space than you do on the earth
B．you can't have water to drink in a spaceship
C．astronauts must learn many new and different things
D．you can't eat anything in a spaceship

单项选择题

The wheel is important because ______ .

A．it was man' s first real invention
B．all transportation depends on it
C．every machine depends on it
D．both B and C