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【简答题】
___策略是指在遗传算法中具有高适应度的个体直接进入下一代___,并且不参与交叉和变异。
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举一反三
【单选题】The meeting between the writer's family and Tracy's parents was arranged because ______.
A.
the writer and her husband wished to express their thanks to Tracy's parents
B.
the local organ bank wanted to see how both families felt about the donation
C.
Tracy's parents wanted to see someone whose life had been saved by the donation
D.
the two families were linked by the most bittersweet ties imaginable
【简答题】日光灯电路主要由灯管、 ______________和______________等组成。
【简答题】Listen and judge. ( )1. I get up early today. ( )2. My hand hurts. ( )3. I'm going to the bookstore. ( )4. I am going to see a doctor. ( )5. I feel bored.
【多选题】日光灯电路主要由镇流器、起动器和灯管组成，在日光灯正常工作的情况下，下列说法正确的是（）
A.
灯管点燃后，起动器中两个触片是分离的
B.
灯管点燃后，镇流器起降压和限流作用
C.
镇流器在日光灯开始点燃时，为灯管提供瞬间高压
D.
镇流器的作用是将交变电流变成直流电使用
【单选题】To get up early and to go to sleep early ____ good for your health. A. is B. are C. was D.
A.
is
B.
are
C.
was
D.
were
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