A. (2013徐州二模)如圖所示,質量為m1的木塊和質量為m2的長木板疊放在水平地面上.現對木塊施加一水平向
A、對m1,根據牛頓運動定律有:F-μ1m1g=m1a,對m2,由於保持靜止有:μ1m1g-Ff=0,Ff<μ2(m1+m2)專g,所以動摩擦因數的大小屬從中無法比較.故A、B錯誤.
C、改變F的大小,只要木塊在木板上滑動,則木塊對木板的滑動摩擦力不變,則長木板仍然保持靜止.故C錯誤.
D、若將F作用於長木板,當木塊與木板恰好開始相對滑動時,對木塊,μ1m1g=m1a,解得a=μ1g,對整體分析,有F-μ2(m1+m2)g=(m1+m2)a,解得F=(
μ | B. 2011-2012徐州市高三二模英語答案 第一部分: 聽力(共兩節,滿分20分) 1—5 ABCAB 6—10 BCBBA 11—15CCBAB 16—20 CACBA 第二部分: 英語知識運用(共兩節,滿分35分) 第一節 單項填空(共15小題;每小題1分,滿分15分) 21—25 BACDA 26—30 BDBCA 31—35 ACDBD 第二節 完形填空(共20小題;每小題1分,滿分20分) 36—40 BADCB 41—45 ADCDB 46—50 ADCAB 51—55 CDBCA 第三部分:閱讀理解(共15小題;每小題2分,滿分30分) A篇 56—59 DABB B篇 60—62 DCB C篇 63—66 CDBA D篇 67—70 BCAD 第Ⅱ卷 (兩部分,共35分) 第四部分 任務型閱讀(共10小題;每小題1分,滿分10分) 71. Break/Split/Divide 72. reaching 73. set 74. Tips/ Advice/ Suggestions 75. visualizing 76. Allocate 77. rather 78. Make 79. failing/failure 80. similar 第五部分 書面表達(共1小題;滿分25分) One possible version: Many animals are in danger of dying out. As is clearly shown in the bar chart, the kinds of wild animals have decreased sharply in the past decades. With 30,000 wild animals reced on average each year, there were only 1.5 million left till 2010. There are several reasons accounting for this problem. Apart from the polluted environment and natural disasters, illegal killing is an important reason. Human beings are making attempts to hunt wild animals for fashion and a big profit, which can be seen vividly from the right picture. This has resulted in a sharp decrease in the number of animals. In my opinion, it is high time for us to take quick action to protect them. A national public campaign should be launched to give animals a good living environment. In addition, the government should pass some firm laws to forbid abuse killing. Only in this way can we live in harmony with wild animals. C. 江蘇徐州高考二模考幾天 既然是二模,那考試的所有模式都是按照高考的樣子做的。 D. 江蘇徐州二模280分是走單招還是高考好 根據自己平時的考試分數,預計一下自己參加高考時的考試成績能夠達到多少分,如果可以達到本科院校的錄取分數線就不要參加單獨招生。 如果能夠報考本科,就不要選擇單獨招生。 E. (2014徐州二模)如圖,正方形ABCD的邊長為25,E為AB中點,MN=5,線段MN的兩端在BC、CD上滑動,當CM=___ 如圖,正方形ABCD的邊長為2 |