※ 引述《Arus ()》之铭言： : 1. : Big Book的P.543 11题 比大小 : A certain car gets 24 miles per gallon of gasoline for city driving, : which is 60 percent of the number of miles per gallon of gasoline the : car gets for high way driving : (A) The number of gallons of gasoline used to drive this car 30 miles : in the city : (B) The number of gallons of gasoline used to drive this car 45 miles : on the highway : 答案是A，不过题目看不太懂 1 加仑汽油 可跑 24 miles for city driving 24*100/60=40 => 1 加仑汽油 可跑 40 miles for high way driving a. 30/24 b. 45/40 : 2. : B Book p.605 15题 比大小 : John has a flat square garden with a perimeter of x feet.David has a flat : rectangular garden with a perimeter of x feet and the length 1 foot longer : than the width. : (A)The area of John's garden (B)The area of David's garden : 答案是A，这题想问的是，是不是只要周长相同的正方形及长方形面积比较， : 一定是正方形面积比较大? : 3. : B Book p.665 14题 比大小 : A certain store sells each pencil at the same price regardless of the number : of pencils sold.k of these pencils have a total price of q cents, and r of : these pencils have a total price of s cents. : (A)ks (B)qr : 答案是C，指两边一样大，题目不是说不论买几只笔每只价钱都一样吗？如果是这样答案不 : 是应该是D吗？还是他的意思是不论买几只笔总价都一样？ 是说不论买几只笔每只价钱都一样 k*价钱=q r*价钱=s q/k=s/r ks=qr : 4. : B Book p.760 30题 : An emergency vehicle travels 10 miles at a speed of 50 miles per hour.How fast : must the vehicle travel on the return trip if the round-trip travel time is : to be 20 minutes? : (A)55mph (B)60mph (C)65mph (D)70mph (E)75mph : 答案是E，题目不太懂，他说去程10miles以速度50miles/hr开，回程以20分钟开完 : ，那不是速度要更慢吗？ 是说整个比赛时间限制是20分钟 60*(10/50)=12 20-12=8 回来只能花8分钟 10/8*60=75 : 5. : B Book p.992 27题 : W : ─┌──────────┐ Top of Page : ↑│ │ : │├──────────┤ : ││ │ │ │ : ││ │ │ │ : H │ │ │ │ : ││ │ │ │ : ││ │ │ │ : ││ │ │ │ : ↓│ │ │ │ : ─└──────────┘ Bottom of Page : The figure above shows the dimensions of a page that has been divided into : four rectangular advertising spaces of equal area.What is the height, in : terms of h, of one of the advertising spaces at the bottom of the page? : (A)1/4 h (B)1/3 h (C)1/2 h (D)2/3 h (E)3/4 h : 答案是E，题目是说每个长方形的长跟宽都一样吗？不会解.. : 希望各强者帮我解答，感谢~ 是说每个长方形面积都一样 w/3*(h-x)=wx h=4x h-x=3/4h 希望没有解错 @@ --

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