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【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 of the decline was a 75 percent drop in the use of leaded gasoline between 1975 and 19Which 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 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.
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【多选题】在体育教学过程中，运动技能形成大致分为分解动作的练习阶段、连贯动作的练习阶段、和。
A.
泛化阶段
B.
连贯动作的独立完成阶段
C.
固化阶段
D.
连贯动作的熟练与自动化阶段
【简答题】是影片影像结构的基本组成单位,是电影造型语言的基本视觉元素。
【多选题】全面建成小康社会不可能是同一水平小康，完全没有差距是不可能的，对此理解正确的有()。
A.
全面建成小康社会是针对全国讲的，不是每个地区、每个民族、每个人都达到同一个水平
B.
全面建成小康社会不能把相关指标简单套用到各省区市
C.
如期全面建成小康社会，既要坚持一定标准，又要防止好高骛远
D.
全面建成小康社会，不搞平均主义
【简答题】什么是影像构成的基本单位
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