人体内有效循环血量的丧失达下列哪项时,机体将无法代偿,出现休克的临床症状( )
A.>5%
B.>8%
C.>10%
D.>20%
E.>40%
参考答案:C
在一个袋中,装有五个除数字外其它完全相同的小球,球面上分别标有1、2、3、4、5这5个数字,从中任摸一个球,球面数字是奇数的概率是______.
— is it from your home to your school?
—It takes about twenty minutes by bike.
A.How long
B.How far
C.How many
D.How much