A:might put
B:should have put
C:need put
D:may have put
读一读,选择划线部分发音不同的一项。
如图所示三个容器,底面积相等,若都装入相同质量的酒精,则酒精对容器底部的压强:( )
There is wrong with Tom's leg. We should send him to hospital at once.