生物圈的构成是[ ]
A.动物和植物
B.海洋和原野
C.生物及其生存环境
D.地球及陆生生物
答案:C
简述流式细胞术尿沉渣分析仪的工作原理。
If you don’t communicate your ideas ______ others, how can they understand you?[ ]
A. to
B. with
C. by
D. through