患者,男,63岁,重症肌无力1个月,胸部MRI平扫图像如下:
患者临床最常见的症状为()
A.杵状指
B.类癌综合征
C.咳嗽
D.眼睑不能上抬
E.咯血
参考答案:D
It is difficult, so I suggest that you __ it to an expert.
A.should leave
B.will leave
C.are leaving
D.may leave
井下避灾的基本原则是什么?