问题 填空题

家庭电路的供电线有两根,有一条在户外就已经和大地相连,叫做______,另一条叫做______,俗称火线.使用试电笔时,用手指按住笔卡,笔尖接触______时,测电笔的氖管就会发光.

答案

家庭电路中有两条进户线,有一条在户外就已经和大地相连,叫零线.另一条叫端线,俗称火线.

手接触测电笔的笔尾金属体,笔尖金属体接触导线,氖管发光时,接触的导线是火线.

故答案为:零线;端线;火线.

选择题
完形填空
完形填空。
     There was a boy who was sent by his parents to a boarding school (寄宿学校).__1__
being sent away,this boy was the__2__student in   his class.He was at the top in every__3__
always with high marks.
     But the boy changed after__4__home and attending the boarding school.His grades started
__5__.He hated being in a__6__.He was lonely all the time.And there were especially dark
times when he__7__committing suicide (自杀).All of this was because he felt__8__and no
one loved him.His parents started__9__about the boy.But they even did not know what was
__10__with him.So his dad decided to travel to the boarding school and__11__him.
     They sat on the bank of the lake near the school.The father started asking him some casual
questions about his classes,teachers and__12__.After some time his dad said,“Do you
know,son,why I am here today?”
     The boy answered back,“To__13__my grades?”
   “No,no,”his dad replied.“I am here to tell you that you are the most__14__person
for me.I want to see you__15__.I don’t care about grades.I care about you.I care about your
happiness.YOU ARE MY LIFE.”
     These words__16__the boy’s eyes to be filled with tears.He__17__his dad.They didn’t
say anything to each other for a long time.
     Now the boy had__18__he wanted.He knew there was someone on this earth who
cared for him deeply.He__19__the world to someone.And today this young man is in college
at the top of his class and no one has ever seen him__20__!
( )1.A.After
( )2.A.hardest
( )3.A.exam
( )4.A.coming
( )5.A.rising
( )6.A.group
( )7.A.led to
( )8.A.worthless
( )9.A.caring
( )10.A.crazy
( )11.A.talk with
( )12.A.family
( )13.A.realize
( )14.A.outstanding
(     )15.A.happy
( )16.A.caused
( )17.A.answered
( )18.A.nothing
( )19.A.showed
( )20.A.sad

B.Before
B.naughtiest
B.activity
B.returning
B.increasing
B.term
B.felt like
B.careless
B.turning
B.true
B.listen to
B.friends
B.analyze
B.important
B.excellent
B.wanted
B.ignored
B.something
B.meant
B.angry

C.When
C.brightest
C.game
C.leaving
C.reducing
C.company
C.thought back
C.concerned
C.worrying
C.possible
C.tell to
C.study
C.check
C.famous
C.interested
C.encouraged
C.hated
C.everything
C.intended
C.pleasant

D.While
D.dullest
D.class
D.reaching
D.dropping
D.party
D.looked for
D.annoyed
D.speaking
D.wrong
D.care about
D.grades
D.test
D.familiar
D.satisfied
D.forced
D.hugged
D.anything
D.expressed
D.joyful