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帮忙做下She said she had never heard me ( ) so well before.A.to sing B.sing C.sanShe said she had never heard me ( ) so well before.A.to sing B.sing C.sang Her son being taken to the polic ,she can not say any words but crying silently请教高手们上面这句话什么地方有错啊,包括语法及习惯用法上的错误 I know you have four girlfriends.But I don't care.Iwant to be you fifth girlfriend.Can you give me __,she could not mask her sadness.A.Hard although she tried to hold herself inB.Hard though she tried to hold herself inC.Hard as did she try to hold herself inD.As she tried hard to hold herself in i heard he （）（sing）at that time.为什么填was sing i heard him （）（sing）at that moment.为什么填singing.老师讲的him加非谓语动词什么的我没听明白,请大家帮我分析 用所给单词的适当形式填空.1.We (sing) songs at that moment .用所给单词的适当形式填空.1.We (sing) songs at that moment .2.By last year,I (finish) learning Book One.3.My father (be) a doctor before he retired.4.When my mother (co 什么是方法论? 在四棱锥P-ABCD中,底面ABCD为菱形,角BAD=60度,Q为AD中点.1.若PA=PD,求证：平面PQB垂直平面PAD.2.点M在线段PC上,PM=tPC,试确定t的值,使PA平行平面MQB3.在2的条件下,若平面PAD垂直平面ABCD,且PA=PD=AD=2,求二面 如图所示 abcd是正方形 pa⊥平面abcd 连接ac bd 在这个立体图形中 互相垂直的平面有?A.4组 B.6组 C.7组 D.8组算出来居然是5组>< 入蜀记 二十三日 译文 .He _________ (live) in America two years ago.2.The boy ________ (listen) to the teacher careful 第十二题, 求几何题的答案 my family s Sunday英语作文 一道有争议的数学题某测量员是这样利用回声测距离的:他站在两平行峭壁间某一位置鸣枪,经过1.00s第一次听到回声,又经过0.50s再次听到回声.已知声速为340m/s,则两峭壁间的距离是多少?答案给 怎么着也不止12个 设函数f(x)在R上的导函数为f'(x),且f(x)>f'(x).若a>b,则（）A.e^b*f(b) 为什么选D My mother is the busiest one in my family. WHO KNOWS WHAT IS THE MEAN OF COLLAPSARWAN? Who knows what ACAD is? 28个辅音和有关他的英语 英语中的28个辅音怎么读求解 He will have to watch his（ ）because of his serious stomach problem.A.style B.diet C.smell D.menu 求详解 ,别就写个答案昂. 英语中,什么是辅音组? 球O1的体积是球O2的体积的125倍，球O1的半径是10cm，求球O2的表面积。 在北纬30度纬线上有甲、乙两地，它们的经度相差120度，计算这两地间的纬线长。感激不尽。 吕蒙正不计人之过一文赞扬了他怎样的性格 从吕蒙正身上我们得到哪些启示 《郑伯克段于鄢》的内容提要 郑伯克段于鄢的内容提要 Those pieces of memory,sporadic scattered in the air