下列棉纺织工业基地中,位于长江中下游棉花产区的是[ ]
A、天津和青岛
B、郑州和西安
C、武汉和上海
D、石家庄和邯郸
答案:C
某学校共有40个教室,每个教室里装着6盏40W的日光灯.由于注意节约用电,平均每盏每天少开半小时,那么一个月(按30天)可节约电( )
A.144度
B.145度
C.146度
D.147度
The construct Cobegin Statement1; Statement2; Coend means Statement1 and Statement2 are to be executed in parallel. The only two atomic actions in this construct are loading the value of a variable and storing into a variable. For the program segment x:=0; y:=0; cobegin begin x:=1; y:=y+x; end; begin y:=2; x:=x+3; end coend Which of the following indicate(s) possible values for the variables when the segment finishes execution Ⅰ. x=1,y=2 Ⅱ. x=1,y=3 Ⅲ. x=4,y=6
A.Ⅰ
B.Ⅱ and Ⅲ
C.Ⅰ and Ⅲ
D.Ⅱ and Ⅲ