中药和西药相比副作用小而安全，不需要做毒理学研究。（）
参考答案：错
一个养猪专业户，去年养猪28头，今年养猪40头，平均每头猪收入250元，今年比去年多收入多少元？
It is strongly suggested that measures
students to cheat in the exams.
A．be taken to prevent
B．be taken to forbid
C．are taken to prevent
D．are taken to forbid
