您所在的当前位置：初中物理试题 >

物质的物理特征

> 某商场的自动扶梯在1min内可以把站在上面不动的人送到楼上，如果扶梯不动，人走上去需3min．那么，人沿着开动的扶梯走上去所需的时间是 A.2min B.4min C.0.75min D.0.5min

问题：

发布时间：2024-09-08

某商场的自动扶梯在1min内可以把站在上面不动的人送到楼上，如果扶梯不动，人走上去需3min．那么，人沿着开动的扶梯走上去所需的时间是

A.2min
B.4min
C.0.75min
D.0.5min

参考答案：

提问用户：d7***ew0

可能感兴趣的题目：

1 香港经济发展的有利条件是 A.有丰富的森林资源 B.有丰富的铁矿 C.有天然良港 D.人多地狭
2 已知，，，则与的夹角是（） A．30 B．60 C． D．150
3 如图，竖直向上抛出一个物体。若不计阻力，取竖直向上为正，则该物体动量随时间变化的图线是（　）
4 某溶液能溶解Al（OH） 3，则此溶液中一定能大量共存的离子组是（　　） A．Mg2+、Cl-、Na+、NO3- B．K+、Na+、NO3-、HCO3- C．Na+、Ba2+、Cl-、NO3- D．Fe3+、Na+、AlO2-、SO42-
5 It is only with the help of scientific research _____ bring PM1 air pollution under control. A．that we will B．we will C．that we do D．do we
6 阅读理解。 Brad Pitt and Angelina Jolie have given $500,000 to help the town of Joplin -a town near the Mississippi River, where Pitt"s mother went to school recover from a huge tornado (龙卷风)that struck on May 22, 2011. The couple made the donation through the Jolie-Pitt Foundation on Thursday to help rebuild the town of Joplin after about 30% of the buildings were destroyed by the tornado. Over 150 people were killed. "The Joplin community faces great challenges ahead," said Brad. "Having spent most of my childhood there, I know these people to be hardworking, humble and especially resilient. "The locally based Community Foundation of the Ozarks will be working shoulder to shoulder with these Joplin citizens for long to rebuild their lives. We, too, hope to further help with these rebuilding efforts." "Last year 42 million people worldwide were hurt by natural disasters," added Angelina. "So often, these disasters seem far away; but now, the need is right here at home for thousands of people. Our hearts go out to the families in Joplin who have lost so much." The Community Foundation of the Ozarks was founded in 1973 and has since grown to include 43 branch community foundations. The Foundation"s task is to improve the quality of life in the Missouri Ozarks area through resource development, community grant making, working together, and public leadership. "We had a call in the first day or two afterward from an organization representing them," said Brian Fogle, president of the Community Foundation of the Ozarks. "They made several calls afterwards, but we learned that they made a donation. 1. Where did the disaster most probably happen? A. in Britain B. in the USA C. in Australia D. in China 2. Brad Pitt and Angelina Jolie donated $500,000 after the disaster_______. A. by post B. in the flesh C. through a foundation D. through the local Red Cross 3. The best title for the passage is______. A. A disaster by a huge tornado in Joplin B. Rebuilding efforts after the disaster C. The Community Foundation of the Ozarks D. A donation from the Pitts
7 市场对农业区位的影响在地域上大为扩展的原因是 ①交通运输条件的改善　 ②农产品保鲜、冷藏等技术的发展　 ③生活习惯的大改变　 ④气候变暖的影响 A．①② B．③④ C．①④ D．②③
8 若函数 f(x)=sin(kx+ π 5 )的最小正周期为 2π 3 ，则正数k=______．
9 2009年10月1日60周年国庆大阅兵时，我国自行设计的空中加油机在天安门上空同时向两架受油机加油，说明了我国航空持续作战能力有了大幅度提高．加油机在表演加油过程中相对下列哪个物体是静止的 A.天安门 B.地面 C.受油机 D.民族团结柱
10 已知角α的终边经过点（-3，4），则sin2α=______．