多项选择题
According to Ricardo's theory of comparative advantage,...
单项选择题According to Ricardo's theory of comparative advantage, countries should: （ ） A. specialize in the production of those goods that it produces most efficiently. B. specialize in the production of those goods that their competitors in the world market currently have monopolies on. C. produce all the products for which they have an absolute advantage. D. produce only the products for which they have an absolute advantage.
据调查，教师对学生拳打脚踢的情况现在已经较少存在，取而代之的是“心罚”。比如：对于成绩不好的罚做题目、罚抄一百...
单项选择题据调查，教师对学生拳打脚踢的情况现在已经较少存在，取而代之的是“心罚”。比如：对于成绩不好的罚做题目、罚抄一百遍；对于不遵守劳动的学生罚站、罚值日等。教师这样的行为（ ） A、是正确的，教育中适当的惩罚是必不可少的 B、是正确的，教师没有侵犯学生的身体健康 C、是不正确的，老师没有做到依法执教 D、是不正确的，教师没能做到团结合作
后肩省的省长约（）cm。
问答题后肩省的省长约（）cm。
