【单选题】The level of lead contamination in United States rivers declined between 1975 and 19Federal regulations requiring a drop in industrial discharges of lead went into effect in 1975, but the major cause ...
A.
The level of lead contamination in United States rivers fell 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.
【简答题】A.Government can break into one's home without proper permission if necessary. B.Federal Constitution forbids surveillance in areas such as locker rooms or the employee lounge. C.Employers are forbidd...
【简答题】Passage Two The most important thing in the news last week was the rising discussion in Nashville about the educational needs of children. The shorthand( 简写 )educators use for this is "pre-K"—meaning ...