脑梗死后CT出现低密度改变的时间一般是()
A．发病后即刻
B．发病后6小时
C．发病后1～2天
D．发病后1周
E．发病后1个月
参考答案：C
—Mike, you look so excited.
--Yeah! There____ a basketball game played by Yao Ming this evening.
A．will have
B．is going to have
C．is going to be
D．are going to be
石油化工企业液化烃罐组距相邻工厂（围墙）的防火间距为（）m。
A、60
B、90
C、120
D、150
