做头颅CT检查诊断脑梗死阳性率较高的时间是()。
A.发病6小时以后
B.发病12小时以后
C.发病48小时以后
D.发病18小时以后
E.发病1周以后
参考答案:C
-Have you got any idea for the summer vacation?
-I don’t mind where we go there’s sun,sea and beach. [ ]
A.as if
B.as long as
C.now that
D.in order that
30位掩码网段,正确的反掩码是()。