调节一国国际收支顺差的手段有（）。
A.提高利率
B.增加国民收入
C.降低利率
D.货币法定升值
E.利用国际贷款
参考答案：B, C, D
Children get tired of learning often because they _____ to do better than they can, both at school and at home. [ ]
A. hope
B. are hoped
C. expect
D. are expected
安全防范技术的发展趋势可以用（）来概括。
A、数字化
B、智能化
C、网络化
D、个性化
E、全球化
