A:to leave
B:to be left
C:being left
D:leaving
根据句意和首字母提示完成下列句子。There are sixty m____ in an hour.He is ill, and his i____ makes us feel sad.A lot of t____ are visiting the Great Wall, so it is very crowded.Good food and e____ help me to study better.It is n____ to eat a balanced diet.
试写出一个二次函数关系式,使它对应的一元二次方程的一个根为0,另一个根在1到2之间:____.
下列区域中,近地面风向与等压线的交角最小的是( )
在一次实验操作技能考试中,甲同学抽到了试题四:用量筒量取了15.6mL的蒸馏水,则甲同学选用的量筒体积最适宜的是( )