双折厅门的快门是由()带动的。
A.慢门
B.摆杆
C.门刀
D.连杆
参考答案:C
---How do you like the concert?
---I really enjoy it. I didn’t expect it was _____ wonderful.
A.more
B.most
C.very
D.as
按照《专利法》的规定,授予专利权的发明和实用新型应具备( )。
A.新颖性
B.创造性
C.科学性
D.实用性
E.美观性