凡有爆炸和火灾危险的区域，操作人员必须穿防静电鞋或导电鞋、防静电工作服。
参考答案：对
各型天疱疮患者血循环中均存在（）。
A.抗角质形成细胞间物质抗体
B.抗基底膜带抗体
C.抗核抗体
D.天疱疮抗体
The computers in the other shop will be ______， but ______ as those in this shop.
A．cheaper； not as better
B．more cheaper； not as better
C．cheaper； not as good
D．more cheap； not as good
