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PREP07 Test 2
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Today's technology allows manufacturers to make small cars more fuel-efficient now than at any time in their production history.
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PREP07 Test 1
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Industrialization and modern methods of insect control have improved the standard of living around the globe while at the same time they have introduced some 100,000 dangerous chemical pollutants, having gone virtually unregulated since they were developed more than 50 years ago.
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OG21 OG2022
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The country of Virodia has, until now, been barely self-sufficient in both meat and grain. Greater prosperity there has gone hand in hand with steadily increasing per capita consumption of meat, and it takes several pounds of grain used as feed to produce one pound of meat. Per capita income is almost certain to rise further, yet increases in domestic grain production are unlikely.
Which of the following is most strongly supported by the information given?
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OG21 OG2022
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Lockeport's commercial fishing boats use gill nets, which kill many of the netted fish, including some fish of endangered species. The fishing commission has proposed requiring the use of tent nets, which do not kill fish: boat crews would then throw back fish of endangered species. Profitable commercial fishing boats in similar areas have already switched over to tent nets. The proposal can therefore be implemented without economic harm to Lockeport's commercial
fishing boat operators.
Which of the following, if true, casts the most serious doubt on the argument made for the proposal?
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第一期
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The triangle ABC is inscribed in the circle O. The radius of the circle is 1. Center O is on diameter AC. AB = BC. What is the area of triangle ABC?
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indiscriminate
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181215
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w=3x, z=3x-y. Is w>z？
1：z-y=9
2：x=3
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181215
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The area of the circular mirror is 64π. A circular edge will be inserted on the mirror. The area of the circular edge is 17π. What is the width of the edge?
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181215
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It takes 4 mins for ab to complete 10000 tasks together. It takes 3 minutes for abc to complete the same task together. How long does it take for c to complete the same task alone?
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181215
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The elements in set B are twice as many as those in set A, and the intersection of AB is empty. $$\frac{1}{3}$$of the elements in set C come from A, and $$\frac{1}{4}$$from B. What is the proportion of intersection of A and C in set C?
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181215
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What is the median of the numbers in the following table?
1：a=4
2：b=5
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181215
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There are 365 days in a year. October 21th is Friday, the 294th day. What day is the 365th day?
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181215
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x,y≠0. Is $$\frac{x}{y}$$ +$$\frac{y}{x}$$ ≥ 2？
1：x < y
2：xy > 0
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181215
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$$(4^{3})^{2}$$*$$(5^{2})^{3}$$+$$16^{3}$$*$$(5^{3})^{2}$$=?
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181215
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What is the number of zeros after the last nonzero number of ($$10^{m}$$+$$10^{5}$$)* ($$10^{n}$$+$$10^{6}$$)=?
1: m ≥ 5
2: n ≥ 6
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181215
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Is $$\frac{xy^{2}}{z^{3}}>1$$?
1:x < z < y
2:x > 0
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181215
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AB=3, BC=4. AD=DE, ∠ADB=∠ABC=90°,CE=?
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181215
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In a certain loan project, the amount of money you can get is equal to the total amount of loan minus the product of the single interest of a year and the total amount of loan. If someone borrows $25000 for half a year and gets $24625, how much is the annual simple interest?
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181215
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Is |x|=y-1？
条件1：x+y=1
条件2：x < 0
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181215
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$$\frac{(n+1)!}{(n+1)!+(n+2)!}$$=?
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