单项选择题 The governor appointed a committee to find out what was wrong（ ）A．did upB．set upC．put upD．took up

未知题型 1958年一项研究中显示，某人群中MN血型的基因型频率如下： (1)这个群体就MN血型而言，是不是处于Hardy-Weinberg平衡状态? (2)就MN血型来说，婚配是不是随机的?

单项选择题 That problem is secondary to the one now facing US.（ ）A．later thanB．better thanC．less important thanD．more exciting than