A:new
B:cold
C:nice
D:small
最简单的动作可只由一块骨骼肌参与完成,如上颌不动,下颌运动。
Helen and Bob are working hard these days because they will put ______ a short play in the school Talent(才艺) show.
有一水池装水12m3,如果从水管中1h流出x m3的水,则经过yh可以把水放完,写出y与x的函数关系式及自变量x的取值范围.