转子流量计特别适用于直径小于()mm的管道。
A.80
B.50
C.40
D.25
参考答案:B
— When will you come to Daqing?
— I will call you _____I arrive.
A.till
B.while
C.as quickly as
D.as soon as
与y=(x>01:x<0-1:0):的功能相同的if语句是 ( )
A.if(x>0)y=1; else if(x<0)y=-1; else y=0; else y=0;
B.if(x) if(x>0)y=1; else if(x<0)y=-1;
C.y=-1; if(x) if(x>0)y=1; else if(x==0)y=0; else y=-1;
D.y=0; if(x>=0) if(x>0)y=1; else y=-1: