垃圾焚烧的工艺要求中，燃烧烟气温度必须在()以上，且滞留时间超过()，这样才能保证垃圾焚烧过程中使有机物得到彻底的解决，减少有害气体的产生（特别是二嗳英)，从而减少后道工序的处理负荷和对周围环境的污染。()
A. 550℃，1秒;
B. 650℃，3秒;
C. 850℃，2秒;
D. 950℃，4秒。
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What values did parents teach their children in the 1950s?
A. a brief in God
B. hard work
C. service to their country
D. all above
How did young people rebel agaist their parents?
A. They dropped off
B. They quarreled with their parents
C. They were dissatisfied with everything
D. They let their hair grow long and wear strange cloth
What kind of music did young people like most in America in the 1950s?
A. Blues
B. Jazz music
C. Rock-and-roll
D. Heavy Metal music
Listen to part 2 and decide what statements are True.A. Hippies longed for more love and personal freedom in America.
A. Hippies longed for more love and personal freedom in America.
B. Timothy Leary urged young people to avoid drugs.
C. Many Americans continued leading normal lives of work, family, and home.
D. Women in the 1960 fought for the same chances as men to get a good education and a good job. They also demanded equal pay for equal work.
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