选择题：28. (多选题) 属于“邪气”的有( )(本题3.0分)A、 六淫疠气B、 虚证实证C、 痰饮瘀血

当总产量下降时（ ）选择一项：A. 边际产量为负B. 平均产量为零C. 平均产量是递减的D. 边际产量为零

⑦( )(本题5.0分) A、 looked B、 taken C、 considered D、 seen

供给价格弹性

Who can learn at least one language? ( )(本题2.5分) A、 Deaf babies. B、 Some severe

What will the people in the white room do, compared with the people in the dark