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【简答题】
垂直于投影面的直线在该投影面上的投影积聚成______。
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【简答题】Later when the children came home for the week of Christmas, the house was bright with Christmas colours.
【单选题】When did her mother put Christmas presents in her stockings?
A.
On Christmas Eve.
B.
Every night.
C.
On Christmas night.
【简答题】有一半径为R的均匀带电球体，电荷体密度为+ρ，今沿球体直径挖一细隧道，设挖隧道前后其电场分布不变，如图所示。现在洞口处由静止释放一点电荷-q，其质量为m，重力在此忽略不计。试分析点电荷在隧道内的运动规律。
【简答题】Except for a number of stores ______ (主要街道两边), the others are closed on Christmas Day.
【简答题】Christmas is a time of all others when want is keenly felt, and abundance rejoices.
【单选题】When Christmas Day is coming, the parents .
A.
usually tell their children that Father Christmas isn't real
B.
sometimes tell their children that Father Christmas comes during the day
C.
tell their children that Father Christmas comes during the night and brings presents to good children
D.
often tell their children that Father Christmas gives presents to poor children
【单选题】In 'LoveActually', Harry is not happy with ()when he is doing Christmas shopping with his wife.
A.
Mia
B.
the sales clerk
C.
his employee
D.
his child
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