5.
若△ABC≌△DEF,且∠A=40°,∠E=60°,则∠C=( )
| A. | 40° | B. | 60° | C. | 100° | D. | 80° |
4.下列说法正确的是( )
| A. | 每个命题都有逆命题 | B. | 真命题的逆命题是真命题 | ||
| C. | 假命题的逆命题是假命题 | D. | 以上都不对 |
19.点(5,2)在( )
0 286624 286632 286638 286642 286648 286650 286654 286660 286662 286668 286674 286678 286680 286684 286690 286692 286698 286702 286704 286708 286710 286714 286716 286718 286719 286720 286722 286723 286724 286726 286728 286732 286734 286738 286740 286744 286750 286752 286758 286762 286764 286768 286774 286780 286782 286788 286792 286794 286800 286804 286810 286818 366461
| A. | 第一象限 | B. | 第二象限 | C. | 第三象限 | D. | 第四象限 |