问题 多项选择题

关于前置胎盘的病因,正确的是()

A.吸烟、吸毒妇女为高危人群

B.瘢痕子宫妊娠后前置胎盘的发生率8倍于无瘢痕子宫

C.多次刮宫史

D.85%~90%为经产妇

E.受精卵滋养层发育与子宫内膜发育不同步

答案

参考答案:A, C, D, E

完形填空
完形填空.
     Some people who find themselves unable to solve a problem react by just giving up.But
it is not good to__1__from problems by giving up or by making__2__for failure.You may
be sure that all young people go through the same__3__process that you are going through
:__4__new situations,developing new skills,and testing their abilities.
     In many cases,we only "think" there is no__5__to a particular problem.But__6__we
can overcome the problem and achieve the goal by making a direct attack. __7__,a boy
wanted to be a debater.When he__8__for the debating team as a freshman,the coach
thought he was _9__.He was shy;he had a high pitched (音调) voice;and his posture
(仪态) was poor.By his junior year,he__10__the school debating team,and in his senior
year he was__11__the team in his state.He achieved his goal because he had made a direct
attack upon his problem.
     __12__attack is often the best way to meet problems,we have to be realistic in judging
situations.__13__it is necessary to __14__either the tactics (策略) or the goal.
     A boy who wants to be a great football player may be too light and not quite __15__
for football.In this situation,becoming a great football player may be an __16__goal for
him.__17__,he may become outstanding in tennis or golf,and__18__his desire to take
part in sports.
     So,although direct attack is often the best way to __19__ problems,it is important to
study the_20__and make a wise decision about what to do.
( )1.A.ignore
( )2.A.excuses
( )3.A.different
( )4.A.overcoming
( )5.A.key
( )6.A.often
( )7.A.In fact
( )8.A.tried out
( )9.A.useless
( )10.A.became
( )11.A.at
( )12.A.When
( )13.A.Seldom
( )14.A.change
( )15.A.smart
( )16.A.impossible
( )17.A.Though
( )18.A.satisfy
( )19.A.meet
( )20.A.cause

B.escape
B.apologies
B.difficult
B.facing
B.answer
B.possible
B.For example
B.went in
B.hopeless
B.made
B.in
B.As though
B.Sometimes
B.rebuild
B.strong
B.unreasonable
B.Ho wever
B.complete
B.deal
B.phenomenon

C.free
C.stories
C.easy
C.meeting
C.way
C.fortunately
C.After all
C.went out
C.helpless
C.entered
C.on
C.While
C.Frequently
C.start
C.confident
C.unfair
C.Fortunately
C.achieve
C.handle
C.situation

D.neglect
D.decisio ns
D.unpleasant
D.judging
D.solution
D.ever
D.In o ther words
D.joined in
D.priceless
D.got
D.of
D.As if
D.Usually
D.renew
D.fast
D.unacceptable
D.Thus
D.win
D.treat
D.difficulty

单项选择题