Most Americans would prefer to keep their problems themselves, and solve their problems ______ themselves.
A. to; by B. by; to C. for; to D. in; on
第1题:
请在(19)处填上最佳答案。
[A] problems
[B] issues
[C] agonies
[D] sufferings
第2题:
第3题:
第4题:
第5题:
第6题:
关于求解命令solve使用错误的是 ()
A.solve(f,x)
B.solve(f)
C.solve(f,f)
D.solve(’f’)