在探究“采集和测算空气中的尘埃粒子”的过程中，我们要学会__________计数的方法。
抽样
In many ways China's rapid growth has been seen as a(n) ____ to improve the cooperation
with other countries.[ ]
A. motivation
B. administration
C. conception
D. realization
妇科健脾和胃，最常用的代表方是（）
A.香砂六君子汤
B.举元煎
C.补中益气汤
D.归脾汤
E.参苓白术散
