下列各项中，《马关条约》与《南京条约》的不同点在于[ ]
A．割地
B．赔款
C．开放通商口岸
D．允许在通商口岸开设工厂
答案：D
----- What are you going to do this afternoon?
----- I’ll probably go for a walk later on _________ it stays fine.
A. as far as B. so long as C. even if D as if
串级调节系统利用主、副两个调节器串在一起来稳定（）。
A.主参数
B.副参数
C.主对象
D.副对象
