【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】若点M在直线b上,b在平面 内,则M、b、 之间的关系可记作( )
【单选题】如图,在平面内,两条直线l 1 ,l 2 相交于点O,对于平面内任意一点M,若p,q分别是点M到直线l 1 ,l 2 的距离,则称(p,q)为点M的“距离坐标”.根据上述规定,“距离坐标”是(2,1)的点共有( )个.
【简答题】句型转换。 1. He often helps me with my English. (改为同义句) He often helps me _______ _______ English. 2. Where are you from? (改为同义句) Where _______ you _______ from? 3. The girl has to read English every day....
【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:______.
【简答题】如图,直线 y= 1 2 x+5 与x轴,y轴分别交于A,B两点,点M为直线AB上一个动点,点N在x轴上方的坐标平面内,若以M,N,O,B为顶点的四边形是菱形,则N的坐标为______.
【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.