18.下列说法:①数轴上表示a和-a两个数的点一定在原点的两侧;②一个数越大,在数轴上表示它的点离原点越远;③正数一定大于负数;④没有最大的负整数,其中正确个数是( )
0 293895 293903 293909 293913 293919 293921 293925 293931 293933 293939 293945 293949 293951 293955 293961 293963 293969 293973 293975 293979 293981 293985 293987 293989 293990 293991 293993 293994 293995 293997 293999 294003 294005 294009 294011 294015 294021 294023 294029 294033 294035 294039 294045 294051 294053 294059 294063 294065 294071 294075 294081 294089 366461
| A. | 1个 | B. | 2个 | C. | 3个 | D. | 4个 |