下述哪一项不属于堆内构件的功能：（）
A、支承
B、定位和导向
C、导流
D、慢化
参考答案：D
From the chart we can learn that the max temperature in Auckland is nearly 30C higher than ______ in Wellington.
A．it is
B．that
C．what is
D．one
生理止血
