用定积分的定义求由y=3x，x=0，x=1，y=0围成的图形的面积。 发布时间：2017-04-14 13:01 │ 来源：www.tikuol.com 题型：解答题 问题： 用定积分的定义求由y=3x，x=0，x=1，y=0围成的图形的面积。
题型：解答题 ABritish Study ToursUsing the wonderful railway system （铁路） we offer an unusual holiday, sport and study program （计划）. Your hotel is a train: eat and sleep on the train and spend each day in a different part of Britain.Summer Schools in FranceWe offer summer schools for students between the ages of 12 and 16. Live with a French family and choose from different activities including horse-riding, football, swimming and skiing.Summer in AustraliaWe will arrange （安排）a program for your students. All our courses take place at the college in Sydney. Morning classes are held in Chinese; evening classes on Australian history are in English. We offer an exciting program of evening activities including music. Dance and theatre.Holiday Programs in GermanyWe offer morning classes in German at all levels （水平）from beginner upwards. In the afternoon you are free to join in our mountain walks or to go shopping in the nearby town. In the evening we organize （组织）a full program for fun. All ages welcome.小题1: If you like traveling by train, you can go to __________.A．Summer School in FranceB．Summer in Australia C．Holiday Programs in GermanyD．British Study Tours小题2:If you want to make your English better, which programs will you choose?A．Holiday Programs in Germany and British Study Tours.B．Summer in Australia and Summer School in France.C．British Study Tours and Summer in Australia.D．Summer School in France and holiday Programs in Germany.小题3: “Summer School in France” is different from the others in that you can ____.A．go at any time of the yearB．stay with a local familyC．go at any ageD．do sports小题4:This passage was written to _____.A．ask people to have a holidayB．attract （吸引）people to take part in their programsC．introduce some beautiful placesD．ask people to study foreign languages 查看答案
题型：解答题 下面的说法正确的个数为（ ） ①若∠α =∠ β，则∠α 和∠β是一对对顶角；②若∠α与∠β互为补角，则∠α+∠β=180°；③一个角的补角比这个角的余角大90°；④同旁内角相等，两直线平行．[ ]A． 1 B． 2 C． 3 D． 4 查看答案