Breakfast is ready, you'd better____.
A:not wake him up
B:not to wake him up
C:to wake him up
D:wake him up
某校举行“诚信之星”评选活动,你会给下列哪位同学投票 ( )
一个袋中装有红黄白球各3个,为确保一次从中取出的球3种颜色都有,则最少要取出( )个球.
农业生产中,为了保护秧苗夜间不致受冻,傍晚时要向秧田里多灌些水,这是因为水( )
读某地气温随高度和时间变化示意图,据此回答下列各题。