下列哪项是休克早期的临床表现()
A.血压下降
B.发绀、四肢厥冷
C.神志淡漠
D.脉压变小尿量减少
E.抽血时血液黏稠易凝
参考答案:D
They will build nature reserves _____ protect ______ birds.
A.to; in danger
B.for; endangered
C.to; endangered
D.for; in danger
水洗型荧光渗透法中,为了检查清洗效果,应在水洗位置安装()