低温时下列哪项参数降低（）
A.血液黏滞度
B.血浆容量
C.血细胞比容
D.中心静脉压
E.微循环阻力
参考答案：A
Some doctors were sent t?the front where medical workers were ＿＿＿.
A．in great need
B．in great need of
C．needed great
D．needed in
清洗内筒时应防止内筒转动。
