4.7时30分,时针和分针构成一个( )
A. | 锐角 | B. | 直角 | C. | 钝角 |
3.有这样一列数:7050.3,705.03,70.503,…根据这一规律,70.503后面是( )
0 159674 159682 159688 159692 159698 159700 159704 159710 159712 159718 159724 159728 159730 159734 159740 159742 159748 159752 159754 159758 159760 159764 159766 159768 159769 159770 159772 159773 159774 159776 159778 159782 159784 159788 159790 159794 159800 159802 159808 159812 159814 159818 159824 159830 159832 159838 159842 159844 159850 159854 159860 159868 199269
A. | 7.0503 | B. | 0.70503 | C. | 70503 | D. | 705030 |