题目内容

What did the boy often do at school?

A. He was often late for school.
B. He often fell asleep in class.
C. He often stayed after class.

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房地产企业成本计算对象的确定应结合其开发程序,开发产品的地点、结构、装修、层高、施工队伍、招投标情况等因素综合考虑后确定。成本核算对象有多种确定方法。下列有误的一项是()。

A. 以开发产品的开发顺序的每一阶段作为成本核算对象,使成本随产品的生产开发同步流转
B. 以独立编制的概、预算或施工图中所列的单项开发工程、发包工程为成本核算对象
C. 按群体开发建设产品为多种成本计算对象
D. 按开发产品的一定区域、部位或发包工程作为核算对象,或者按开发期别为成本核算对象

建设工程承包人可以将其承包的全部建设工程分为几个独立的部分,以分包的名义转包给其他具有相应施工资格的承包人。()

A. 正确
B. 错误

为预防感染的再次发生,应当注意的是()

A. 幼儿应当穿开裆裤
B. 预防性服用抗生素
C. 给女婴从前向后擦洗会阴
D. 男孩可以不必在意
E. 少饮水,减少排尿

Ultralight(超轻型的) airplanes are a recent development in aviation that provide what aviation enthusiasts have long been seeking: an inexpensive airplane that is easy to fly. The ultralight plane was born of the marriage of the hang glider and the go-kart(微型单座赛车) engine around 1974, when John Moody mounted a 12-horsepower go-kart engine on his Icarus Ⅱ hang glider.
Today’s ultralights are not just hang gliders with engines; they are" air recreation vehicles". Modem ultralight planes use snowmobile(雪地机动车)engines that let them cruise at about 50 miles per hour, climb at about 500 feet per minute, and carry combined payloads of pilot and fuel up to about 200 pounds, which is about equal to an ultralight plane’s weight when empty. More than ten thousand ultralight planes were sold last year at prices ranging from $ 2,800 to $ 7,000. But the main reason for the increasing popularity of these aircraft is not that they are inexpensive, but that they are fun to fly.
The modern ultralight plane would look very familiar to the earliest pioneers of aviation. Otto Lilienthal made more than 2000 flights in Germany in the 1890’s in what were actually hang gliders. Octave Chanute designed and built many early hang gliders. Augustus Herring, Chanute’s assistam, used these gliders as models for a glider that he built for him self. On this glider, Herring installed a compressed-air motor and flew 267 feet in 1898. The Wright brothers' Flyer was the grandfather of today’s ultralight plane. The pilot sat right out in the open, just as in modem ultralights, and used con trois that were much the same as those used in today's machines.
Though most ultralight planes are used for pleasure flying, some are also used for crop dusting, aerial photography, and even military observation service. The likelihood is that further uses will be found for ultralight planes, but their greatest use will continue to be as air recreational vehicles.
The author seems to feel that ultralight airplanes are ______.

A. a toy for the rich
B. nothing but hang gliders
C. a new development that meets the needs of aviation enthusiasts
D. the most important development in aviation since the Wright brothers' Flyer

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