新东方逻辑绿皮书 Q126， Q267

Q126

The level of lead contamination in United States rivers declined between 1975 and 1985. Federal regulations requiring a drop in industrial discharges of lead went into effect in 1975, but the major cause of the decline was a 75 percent drop in the use of leaded gasoline between 1975 and 1985.

Which of the following, if true, best supports the claim that the major cause of the decline in the level of lead contamination in United States rives was the decline in the use of leaded gasoline?

A. The level of lead contamination in United States rivers fall sharply in both 1975 and 1983

B. Most of the decline in industrial discharges of lead occurred before 1976, but the largest decline in the level of river contamination occurred between 1980 and 1985

C. Levels of lead contamination in rivers fell sharply in 1975-1976 and rose very slightly over the next nine years

D. Levels of lead contamination rose in those rivers where there was reduced river flow due to drought

E. Although the use of leaded gasoline declined 75 percent between 1975 and 1985, 80 percent of the decline took place in 1985

Why B, I choose E

Q267

In Patton City, days ae categorized as having heavy rainfall ( more than two inches), moderate rainfall (more than one rich, but no more than two inches), light rainfall (at least a trace, but no more than one inch), or no rainfall. In 1990, there were fewer days with light rainfall than in 1910 and fewer with moderate rainfall, yet total rainfall for the year was 20 percent higher in 1990 than in 1910.

If the statements above are true, then it is also possible that in Patton City

A. the number of days with heavy rainfall was lower in 1990 than in 1910

B.the consumer of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910

C. the number of days with some rainfall, but no more than two inches,. was higher in 1990 than in 1910

D. the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910

E, the average amount of rainfal per month was lower in 1990 than in 1910

Why choose A?