植物生长发育所要求的理想昼夜温度条件是（）
A.昼夜温度均较高
B.昼夜温度相等
C.较高日温较低夜温
D.较高夜温较低日温
参考答案：C
They want to know ________ do to help us.
A．what can they
B．how they can
C．what they can
D．how can they
大陷胸汤中大黄先煮，是取其（）之意。
