13 . 在“同一平面内”的条件下,下列说法中错误的有( )①过一点有

13 under the conditions in the "same plane", the following statements are in error () <br>① and only a little over a straight line parallel to the known; ② and only a little over a straight line perpendicular to a given line; ③ two the positional relationship of different pieces intersect only linear, parallel two kinds; ④ two disjoint line is called the parallel lines; ⑤ have a common vertex and has a common edge of the two supplementary angles to each other o. <br><br><br>A. B. 2. 1 th C. 3 months months months D. 4

13 . Under the condition of "inside the same plane", the following statements are false ( )<br>(1) There is and only one line is parallel to a known line; (2) there is a little and only one line is perpendicular to a known line; (3) two different lines have only intersecting, parallel two; (4) two lines that do not intersect are called parallel lines; (5) two corners with public vertices and a common edge are adjacent to each other.<br><br>A. 1 B. 2 C. 3 D. 4

13. Under the condition of "in the same plane", there are ()<br>① There is only one straight line passing through a point which is parallel to the known straight line; ② there is only one straight line passing through a point which is perpendicular to the known straight line; ③ there are only two kinds of position relations between two different lines that are intersecting and parallel; ④ there are two lines that are not intersecting which are called parallel lines; ⑤ there are common vertices and two angles of a common edge which complement each other<br>A. 1 B. 2 C. 3 d. 4