一个正常人的平均心跳速率约为每分钟70次，一个月大约跳( )次．（用科学记数法表示，一个月以30天计算）
3.024×106
如果抛物线y=x2-6x+c-2的顶点到x轴的距离是3，那么c的值等于______．
Bob's doctor suggests _______ for a few weeks. [ ]
A. that he is resting
B. he rest
C. he resting
D. him to rest
