A.55%~65% B.20%~30% C.70%~80% D.80%~85%
A.收縮壓 B.舒張壓 C.中心靜脈壓 D.外周靜脈壓
A.大 B.小 C.無(wú)明顯變化 D.開(kāi)始較大;后來(lái)無(wú)明顯變化