CT平扫不能显示的病变是
A．血管壁钙化
B．肾阳性结石
C．夹层动脉瘤
D．支气管扩张
E．肺间质纤维化
参考答案：C
用declare与announce的正确形式完成句子
1. Everyone was silent as he the list.
2. The US war on England in 1812.
3. The painting was to be a forgery(赝品) .
为什么新型窑外分解窑SP窑运行时容易出现红窑，试分析有那些原因？如何避免？
