按照触电防护方式,电气设备分为4类,其中( )设备具有双重绝缘和加强绝缘的安全防护措施。
A.0类 B.Ⅰ类C.Ⅱ类 D.Ⅲ类
参考答案:C
3. It is exactly its great success in rural reforms _____ prompted the country to make a bigger leap forward in the reform and opening-up drive.
A.where
B.what
C.that
D.when
急性心肌梗死的并发症有()
A. * * 肌功能失调或断裂
B.心脏破裂
C.栓塞
D.心室壁瘤
E.心肌梗死后综合征