风险与收益是相互影响、相互作用的,一般遵循低风险高收益的基本规律。()
参考答案:错
解析:风险与收益是相互影响、相互作用的,一般遵循低风险低收益的基本规律。
A student had an average of 86 for three tests. If the student’s highest test score was 2a, what was the average of the student’s two lowest scores ?()
A.129-2a
B.258-2a
C.129-a
D.258+2a
E.258-a
为“血中气药”,能“上行头目,下调经水”的药物是
A.川芎B.延胡索C.姜黄D.莪术E.郁金