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【单选题】
请根据短文内容,回答题。 Moderate Earthquake Strikes England A moderate earthquake struck parts of southeast England on 28 April 2007, toppling chimneys from houses and rousing residents from their beds. Several thousand people were left without power in Kent County. One woman suffered minor head and neck injuries. "It felt as if the whole house was being slid across like a fun-fair ride," said the woman. The British Geological Survey said the 4.3-magnitude quake struck at 8:19 a.m. and was centered under the English Channel, about 8.5 miles south of Dover and near the entrance to the Channel Tunnel. Witnesses said cracks appeared in walls and chimneys collapsed across the county. Residents said the tremor had lasted for about 10 to 15 seconds. "I was lying in bed and it felt as if someone had just got up from bed next to me." Said Hendrick van Eck,27, of Canterbury about 60 miles southeast of London." I then heard the sound of cracking, and it was getting heavier and heavier. It felt as if someone was at the end of my bed hopping up and down." There are thousands of moderate quakes on this scale around the world each year, but they are rare in Britain. The April 28 quake was the strongest in Britain since 2002 when a 4.8-magnitude quake struck the central England city of Birmingham. The country&39;s strongest earthquake took place in the North Sea in 193 l, measuring 6.1 on the Richter scale. British Geological Survey scientist Roger Musson said the quake took place on 28 April in an area that had seen several of the biggest earthquakes ever to strike Britain, including one in 1580 that caused damage in London and was felt in France. Musson predicted that it was only a matter of time before another earthquake struck this part of England. However, people should not be scared too much by this prediction, Musson said, as the modern earthquake warning system of Britain should be able to detect a forthcoming quake and announce it several hours before it takes place. This would allow time for people to evacuate and reduce damage to the minimum. The biggest earthquake took place in Britain__________. 查看材料
A.
in 1931
B.
in 1580
C.
in2002
D.
in2007
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【单选题】下面关于动力转向系的说法不正确的是()
A.
当汽车直线行驶而转向盘没有转动时,液压助力装置不工作,无助力作用
B.
一旦液压助力装置失效,该动力转向器即变成机械转向器
C.
一旦液压助力装置失效,汽车将不能转弯
【多选题】关于转向系的角传动比,下面说法正确的是:
A.
转向系角传动比大小影响转向操纵的轻便性和转向灵敏性
B.
转向系角传动比越大,转向越灵敏,但操纵费力
C.
转向系角传动比越大,转向操纵越省力,但转向不够灵敏
D.
转向系角传动比越大,转向越灵敏,操纵也越省力
【单选题】下面关于动力转向系的说法不正确的是:
A.
当汽车直线行驶而转向盘没有转动时,液压助力装置不工作,无助力作用。
B.
一旦液压助力装置失效,该动力转向器即变成机械转向器。
C.
一旦液压助力装置失效,汽车将不能转弯。
D.
动力转向的助力大小遵循“渐进随动原理”。
【单选题】与一般的死亡相比较,不属于安乐死的特征( )
A.
安乐死必须由医务人员参与
B.
安乐死的对象必须是在目前医学条件下身体品质无法复原的绝症患者
C.
安乐死必须在医院中实施
D.
安乐死必须是由病人或家属自己提出要求,才可以实施
【多选题】在从原点出发的射线与 TC 曲线相切的产量上,必有
A.
AC值最小
B.
AC=MC
C.
MC曲线处于下降段
D.
MC曲线处于上升段
【多选题】食管癌的早期临床表现包括
A.
食管内异物感
B.
胸骨后针刺样疼痛
C.
咽下食物时哽噎感
D.
进行性吞咽困难
E.
上腹部烧灼感
【多选题】在从原点出发的射线与TC曲线相切的产量上,必有( )
A.
AC=TC
B.
AC=MC
C.
AC最小
D.
AC曲线的最低点
【单选题】在从原点出发的射线与TC曲线相切的产量上,必有:
A.
AC值最小
B.
AC=MC
C.
MC曲线处于上升段
D.
上述都对
【单选题】在从原点出发的射线与TC曲线的相切的产量上,必有( )。
A.
AC 值最小
B.
AC=MC
C.
MC 曲线处于上升阶段
D.
上述各种说法都对
【多选题】食管癌的早期临床表现包括()。
A.
食管内异物感
B.
进行性吞咽困难
C.
胸骨后针刺样疼痛
D.
咽下食物时哽噎感
E.
上腹部烧灼感
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