【单选题】He often helps the poor children _________ giving the money.
【单选题】母乳无法喂养或婴儿断离母乳时应首选 ( )。
【单选题】He often helps the students _______ he thinks are not quick at their studies.
【单选题】When he is free, he often helps his parents ________ some housework.
【单选题】(2017上真题)学校利用板报、窗、走廊、墙壁、雕塑、地面、建筑物等媒介,旨在体现教育理念,实现育人功能。在课程分类中,这属于( )。
【单选题】—What’s your friend like? —______________.He often helps others.
【简答题】现给出如下四个命题: ①过点A(4,1)且在两坐标轴上的截距相等的直线共有两条; ②若平面α内的两条直线都与平面β平行,则α ∥ β; ③已知α∩β=l,若α内的直线m垂直于l,则α⊥β; ④已知α⊥β,α∩β=l,若α内的直线m与l不垂直,则m与β也不垂直. 请你写出其中所有真命题的序号:______.
【单选题】He often helps his classmates _____________ their English. [ ]
【单选题】He often _______ me _______ my English. [ ]
【单选题】点P、Q、R是平面内不在同一条直线上的三个定点,点M是平面内任意一点,若 P,Q,R,M四点恰能构成一个平行四边形,则在平面内符合这样条件的点M 有( )个.