A:不溶于水,且必须易与碘发生化学反应
B:不溶于水,且比水更容易使碘溶解
C:不溶于水,且必须比水密度大
D:不溶于水,且必须比水密度小
When he entered the hall, he found the big desk with flowers and many people at him kindly.
若不等式1n+1+1n+2+⋯+12n>m72对于大于1的一切正整数n都成立,则正整数m的最大值为 ( )