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• 18．如图所示，四个完全相同的弹簧都处于水平位置，它们的右端受到大小皆为F的拉力作用，而左端的情况各不相同：①中弹簧的左端固定在墙上，②中弹簧的左端受大小也为F的拉力作用，③中弹簧的左端拴一小物块，物
• 19．一定质量的气体经历一缓慢的绝热膨胀过程。设气体分子间的势能可忽略，则在此过程中（ ） (A)外界对气体做功，气体分子的平均动能增加 (B)外界对气体做功，气体分子的平均动能减少 (C)气体对外界
• This machine is very easy . Anybody can learn to use it in a few minutes.(A)operating (B) to be
• (A)it (B) itself (C) him (D)himself
• (A)sound (B) alarm (C) noise (D)voice
• 17．如图，一简谐横波在x轴上传播，轴上a、b两点相距12m。t ＝0时a点为波峰，b点为波谷；t ＝0.5s时，a点为波谷，b点为波峰。则下列判断中正确的是 (A)波一定沿x轴正方向传播 (B)波长
• 18．两种单色光由水中射向空气时发生全反射的临界角分别为 、 ，已知 > ，用nn2分别表示水对两单色光的折射率，vv2分别表示两单色光在水中的传播速度，则 （ ）
• If you’re buying today’s paper from the stand, could you get for me?(A)one (B) such (C)this (D)
• . (A)Falling (B) Lying (C)Appearing (D)Thinking
• (A)like (B) as (C)except (D)among

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• 1 戶籍行政之主管機關，在中央為下列何者？(A)經濟部(B)交通部(C)法務部(D)內政部
• 14．现有1200个氢原子被激发到量子数为4的能级上，若这些受激氢原子最后都回到基态，则在此过程中发出的光子总数是多少？假定处在量子数为n的激发态的氢原子跃迁到各较低能级的原子数都是处在该激发态能级上
• — I’m terribly sorry to interrupt, but may I use your phone? It’s rather urgent.— Yes, .(A)with
• . (A)anything (B) nothing (C) something (D)everything
• . (A)walked (B) ran (C)returned (D)withdrew
• Not until he retired from teaching three years ago having a holiday abroad.(A)he had considered
• One of our rules is that every student wear school uniform while at school.(A)might (B) could (C
• . (A)familiar (B) lovely (C)ordinary (D)outstanding
• . (A)rapidly (B) ruddenly (C)madly (D)urgently
• Jack is a great talker. It’s high time that he something instead of just talking.(A)will do (B)
• . (A)shut out (B) shut off (C) shut down (D)shut up
• . (A)bedroom (B) basement (C)yard (D)house
• The newcomer went to the library the other day and scarched for he could find about Mark Twain.(
• . (A)marched (B) flew (C)struggled (D)climbed
• (A)at the bottom of (B) in the middle of (C). at the top of (D) in the front of
• (A)regretting (B) resting (C)relaxing (D)recovering
• (A)never (B) ever (C)still (D)already
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• We can learn from Paragraph 4 that American students______(A)have a great interest in studyi
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• The old man spends one hour in walking every morning .This is ______ he keeps fit .(A)what (B)ho