How _____ relish do we need for the shake?[ ]
A. some
B. any
C. many
D. much
答案:D
心脏瓣膜向一个方向开放,使血液流动的方向是 ( )
A.心房→心室→静脉
B.心室→心房→动脉
C.心室→心房→静脉
D.心房→心室→动脉
下列哪项不属于小区干扰随机化技术()
A.加扰
B.交织
C.跳频
D.IRC