下列哪项引起肺栓塞的可能性最小（）
A.空气
B.脂肪
C.生理盐水
D.血栓
E.羊水
参考答案：C
This morning our head teacher came to school _________ than ________ student in our class.
A．much early; any
B．much earlier; any other
C．much early; any other
D．much earlier; any
携带角
