61. How much did he charge you ____________ repairing the bike? 62. He was permitted ____________ (ask) a day off. 63. He hurried to school, leaving the meal ____________ (touch). 64. Buses _______
下列行为中属于先天性行为的是.........................（ ）A、蜘蛛结网 B“红灯停，绿灯行”C、猴子骑自行车
固定的光滑圆弧轨道ABC处在竖直平面内，圆轨道半径为R，半径OA处于水平，OB处于竖直方向，。如图所示，一个小物块质量为m，从A处由静止开始滑下，
如下图，村里有一个近似于扇环形的水塘，测得弧形池边AB长20m，CD长30m，直形池边AD=BC=15m，现准备用来养鱼，若每亩水面可以放鱼苗1万尾左右，那么这
---Why not buy the beautiful necklace since you like it so much? ---I would but I _____ have enough money. A. didn’t B. shouldn’t C. don’t D.
（08年玉溪一中期中物理文）关于分子动理论的内容，下列说法中正确的是A．物质是由大量分子组成的B．布朗运动的剧烈程度与温度的高低无关C．分子
．“再现历史场景，弘扬民族精神”是历史影视剧的主题，若要再现民族英雄邓世昌率领中国军队抗击日 本侵略者的悲壮场景，应该选择的素材是 A．
(10·北京B篇) Open Letter to an Editor I had an interesting conversation with a reporter recently---one who works for you. In fact, he's one of your best reporters. He wants to lea
x＋5=0或x-1=0