心脏舒张期分为哪四个期()。
A.等容舒张期
B.快速心室灌注期
C.心休息期或慢灌注期
D.心房收缩期
E.心房舒张期
参考答案:A, B, C, D
有如下程序: #include"iostream.h" void main( ) { int x=1,a=0,b=0; switch(x) { case 0:b++; case 1:a++; case 2:a++;b++; } cout < < "a=" << a < < "," < < "b=" < < b; } 该程序的输出结果是
A.a=2,b=1
B.a=1,b=1
C.a=1,b=0
D.a=2,b=2
In the dark street, he could find nobody he could ______.
A.turn off
B.turn to
C.turn out
D.turn away