According to Paragraph 4, why does the author say that wind power represents an even more
A. The wind power is more convenient and easy to handle.
B. The wind power is more convenient to use than local utility.
C. The wind power is inconvenient but homeowners have to use it.
D. The wind power is so costly that few people prefer to use it.
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P25一P75范围内的变量值有
A. 47.5%
B. 45. 0%
C. 90.0%
D. 95.0%
E. 50.0%
The word grouse in Paragraph 3 is closest in meaning to______.
A. talk
B. complain
C. speak
D. tell
因为营养不良,容易出现的主要营养问题
佝偻病、蛋白质一热量摄人不足、维生素缺乏、缺铁性贫血、缺锌症等
A. 胎儿期
B. 婴幼期
C. 学龄期
D. 青少年期
E. 老年期
According to the recommendation of the CDC, when should people receive vaccinations in America?
A. People should receive a vaccination one or two weeks earlier before influenza activity.
B. People should receive a vaccination before the influenza epidemic.
C. People should get flu shots in March when the influenza activity ends
D. People should get flu shots before October so as to develop antibodies