sat a is decreased by b 是 a-b还是b-a啊

sat a is decreased by b 是 a-b还是b-a啊 A is decreased by b 是a减b 为什么? 是不是a is decreased by b 是b减a A decreased by b 就是a是不是a is decreased by b 是b减a A decreased by b 就是a减b Over the past decades,sea ice ___ in the Arctic as a result of global warming.A.had decreased B.decreased C.has been decreasing D.is decreasing A decreased by B是A-B还是B-A? The price of a gallon of gasoline at the pump increased by 10 percent at thea.increased; increased b.increased; decreased c.increased; did not change d.decreased; decreased e.decreased; increased ）Over the past decades,sea ice in the Arctic as a result of global warming.）Over the past decades,sea ice in the Arctic as a result of global warming.A.had decreased B.decreased C.has been decreasing D.is decreasing 解释一下 If y varies inversely as the square of x, then when x is doubled y is a) multiplied by 4 b) divided by 4 c) increased by 4 d) decreased by 4 e) unchanged帮忙翻译一下 不懂啊 Over the past decades,sea ice ________ in the arctic as a result of global warming.A had decreased B decreasedC has been decreasingD is decreasing此题为什么选答案C, “Betty sat in the front seat of the classroo“Betty sat in the front seat of the classroom.”I thought she ______in the back.A.had sat B.sat C.has sat D.is sitting .All her doubts vanished after she read the letter from Jimmy.(A) broke (B) decreased (C) disappeared (D) grew 宏观经济的题an open market ____ by the Fed increases money supply,which leads to ____ interest rates and increased GDP A.purchase,decreased B.Sale.decreased C.Sale,increased D.purchase,increased 陈向东 最新GRE数学预测模拟试题4第22题If a is increased by 25% and b is decreased by 25%,the resulting numbers will be equal.What is the ratio of a to 这里的resulting numbers是什么意思?a和b是怎样的相互关系? The couch is comfortable to __________ A sit B ber sat C sitted D sit on the chair is comfortable?the chair is comfortable to a sit b sit onc be sat d be sat on希望给出这方面的规律 如果气体温度不变,体积减少,以下那个正确?PV=nRTA.气体的质量减少B.气体体积增加（答案给的是B,why?我觉得很奇怪啊,A不是挺对的吗?）If the volume of a gas is decreased while its tempreture is held constant,w SAT2物理的一道题,有关气体的If the volume of a gas is decreased while its temperature is held constant,which of the following will occur?(A)The average kinetic energy of the molecules of the gas will increase(B)The average kinetic energy of 急!懂英语和数学的来啊!The length and width of a rectangle are 12cm and 5cm respectively. If the length is increased by 50% and the width is decreased by 20%.(a)Find the original area of the rectangle.(b)Find the new area of the rectangle.(c