A．做的功越多
B．做功的本领越大
C．越省力
D．有用功与总功的比值越大
答案：D
The twins in Shanghai last week but now they in Hainan. [ ]
A. are ; are
B. were ; were
C. were ; are
D. are ; were
程序设计语言有高级语言，汇编语言和（）。
