下列哪种情况使血液粘稠度升高（）
A.红细胞比积明显降低
B.纤维蛋白原减低
C.切变率降低
D.温度升高
E.红细胞数量减少
参考答案：C
It's too late to go to the basketball match now, ____, it's beginning to rain.
A．beside
B．besides
C．except
D．except that
为什么发酵设备及管道的末端要安装小排汽阀？
