格里菲思和艾弗里所进行的肺炎双球菌的转化实验，证实了（ ）①DNA是遗传物质②RNA是遗传物质③DNA是主要的遗传物质④蛋白质不是遗传物质⑤糖类不是遗传物质⑥DNA能产生可遗传的变异
A：①④⑤⑥
B：②④⑤⑥
C：②③⑤⑥
D：③④⑤⑥
朱元璋认为，“礼乐者，治平之膏粱；刑政者，救弊之药石”，“刑政二者，不过辅礼乐为治耳”。这表明他（ ）
Hearing the good news that he had been admitted into his dream university after so many years of hard work, his parents couldn't help b____ into tears.
