账簿按照外型特征可以分为()。
A.订本式账簿
B.备查账簿
C.活页式账簿
D.卡片式账簿
参考答案：A, C, D
- Didn't the robot have a rest?
-_______. Because it never gets tired.
A．No, it did
B．Yes, it did
C．No, it didn't
D．Yes, it didn't
皮革制造厂主要存在的污染物是（）
A.粉尘
B.氰化合物
C.苯等有机溶剂
D.病原微生物
E.硫化氢
