一个点电荷从电场中的a点移到b点，其电势能变化为零，则（ ） A．a、b两点的场

办理卡片激活时密码遗忘的，先办理密码挂失，再通过主管授权办理卡片激活、密码重置。

完形填空（共20小题；每小题1.5分，满分30分）

阅读下面短文，掌握其大意，然后从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑

There was a stranger at my doorstep this morning. I was a little __36__ at first because my parents warned me not to talk to strangers, __37__ he seemed to be a fellow student in my college so I began to calm down soon after.

__38__ in old but neatly pressed clothes, the tall boy began explaining his __39__. He told me about his school fees and said that the time __40__ his exam was approaching. Though his grades were excellent, he would not be __41__ to take his exams if he failed to __42__ the money for all of the tuition fees. He was studying Computer Applications in my city. __43__ I had friends studying the same course in my college, __44__ meant that I could ask them all about him.

The boy was still $ 2,500 short of the $ 30,000 that his tuition __45__. He was having a hard time, and he had a bad family situation __46__. I didn’t have much money, so I gave him an __47__ foreign book on computer languages. I thought that he __48__ could not afford such a textbook. I also remembered that I had won $ 500 in a contest. I __49__ the entire $ 500 to my newly made friend and __50__ him good luck with his exams.

When you are in college, __51__ is very important __52__ to buy new textbooks or to hang out with friends. When I saw this fellow, I was __53__ of my other friends, many of whom were excellent, but were __54__ to pay for their education. This replaced all the hesitation and __55__ in my mind with generosity.

Since then, I have never wasted even a single coin on anything that I don’t need.

36．A．amused               B．interested            C．scared                 D．satisfied

37．A．but                     B．therefore             C．besides                D．now that  

38．A．Dressing             B．Dressed               C．To dress              D．To be dressed

39．A．question              B．study                  C．aim                     D．problem

40．A．of                       B．in                       C．for                      D．to

41．A．suggested            B．allowed               C．asked                  D．required

42．A．catch hold of       B．come up with       C．make up for         D．take possession of

43．A．Fortunately         B．Simply                C．Sometimes          D．Quickly

44．A．where                 B．what                   C．that                     D．which

45．A．used                   B．needed                C．cost                    D．took

46．A．as usual               B．as well                C．as yet                  D．as a whole

47．A．informal             B．ordinary              C．extra                   D．expensive

48．A．surely                 B．finally                 C．probably             D．regularly

49．A．handed in            B．handed over         C．handed down       D．handed out

50．A．wished                B．hoped                 C．wanted                D．told

51．A．friendship           B．luck                    C．money                D．health

52．A．whether              B．how                    C．if                        D while

53．A．charged            B．accused               C．warned             D．reminded                         

54．A．struggling           B．studying              C．willing                D．unwilling  

55．A．excitement          B．doubt                  C．belief                  D．faith

教学是一种交往过程，是()

A．认知过程

B．教师主导学生主体

C．教师与学生双主体

D．学生主导教师主体

违法行为一定是违反道德的，但违反道德的行为不一定都违法。( )

在梯子上工作时，梯子与地面的倾斜角度为（），且工作人员必须登在距梯顶不少于（）的梯蹬上工作。

A、60°，0.7m；

B、70°，1m；

C、60°，1m；

D、65°，0.7m。