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完形填空 I can still remember it like it was yesterday. I was a college freshman and had 1 up most of the night before laughing and talking with friends. Now just before my first 2 of the day my eyelids were feeling heavier and heavier and my head was drifting down to my desk to make my textbook a 3 . A few minutes' nap (小睡) time before class couldn't 4 , I thought. BOOM! I lifted my head suddenly and my eyes opened wider than saucers. I looked around with my 5 beating wildly trying to find the cause of the 6 . My young professor was looking at me with a boyish smile on his face. He had 7 dropped the textbooks he was carrying onto his desk. 'Good morning!', he said still 8 . 'I am glad to see everyone is 9 . Now let's get started.' For the next hour I wasn't sleepy at all. It wasn't from the 10 of my professor's textbook alarm clock either. It was instead from the 11 discussion he led. With knowledge and good 12 he made the material come 13 . His insight was full of both wisdom and loving-kindness. And the enthusiasm and joy that he 14 with were contagious (有感染力的). I 15 the classroom not only wide awake, but a little 16 and a little better as well. I learned something far more important than not 17 in class that day too. I learned that if you are going to do something in this life, do it well and do it with 18 . What a wonderful place this would be if all of us did our work joyously and well. Don't sleepwalk your way through 19 then. Wake up! Let your love fill your work. Life is too 20 not to live it well. (     )1. A. took (     )2. A. class (     )3. A. platform (     )4. A. lose (     )5. A. heart (     )6. A. trouble (     )7. A. angrily (     )8. A. smiling (     )9. A. active (     )10. A. sound (     )11. A. fascinating (     )12. A. gesture (     )13. A. strange (     )14. A. taught (     )15. A. decorated (     )16. A. clearer (     )17. A. discussing (     )18. A. joy (     )19. A. work (     )20. A. hard B. divided B. test B. pillow B. help B. mind B. noise B. carelessly B. talking B. curious B. shock B. convincing B. sense B. natural B. spread B. filled B. smarter B. speaking B. speed B. life B. complex C. stayed C. task C. carpet C. last C. thought C. failure C. intentionally C. complaining C. present C. interruption C. puzzling C. humor C. handy C. combined C. left C. quieter C. cheating C. aim C. journey C. short D. put D. lecture D. wall D. hurt D. head D. incident D. accidentally D. shouting D. awake D. blow D. encouraging D. design D. alive D. started D. entered D. stronger D. sle eping D. determination D. college D. simple
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【简答题】下列由实验得出的结论正确的是 实验 结论 A 向 FeSO 4 溶液中滴入几滴 KSCN 溶液,无明显现象,再加入几滴溴水,溶液变血红色 氧化性 Br 2 >Fe 3+ B 蘸有浓氨水的玻璃棒靠近某溶液,有白烟产生 该溶液是浓盐酸 C 向 NaHCO 3 溶液滴加 CaCl 2 溶液,生成白色沉淀 白色沉淀是 Ca(HCO 3 ) 2 D 向淀粉溶液中加入 3-5 滴稀硫酸。煮沸后冷却,加入新制 ...
【单选题】下列叙述中正确的是(  )
A.
某溶液加入CCl 4 ,CCl 4 层显紫色,证明原溶液中存在I -
B.
向某溶液中先滴加CaCl 2 溶液,产生白色沉淀,再滴加稀盐酸沉淀溶解并产生无色气体,该气体能使澄清石灰水变浑浊,则该溶液中一定有CO 3 2-
C.
液溴易挥发,存放液溴应加水封,并保存在棕色试剂瓶中
D.
向某溶液中先滴加BaCl 2 溶液,产生白色沉淀,再滴加稀盐酸白色沉淀不溶解,该溶液一定含有SO 4 2-
【单选题】The ship's generator broke down, and the pumps had to be operated ______ instead of mechanically.
A.
manually
B.
artificially
C.
automatically
D.
synthetically
【单选题】某固体混合物由K 2 CO 3 、K 2 SO 4 、CaCl 2 和KCl中的一种或几种组成,实验记录如下:①取该样品溶于水,得到无色溶液;②取适量上述溶液滴加过量的BaCl 2 溶液,出现白色沉淀,过滤;③向步骤②所得沉淀中加入过量的稀HNO 3 ,沉淀部分消失并产生气泡;④取步骤②的滤液加入AgNO 3 溶液生成白色沉淀,再加入稀HNO 3 ,振荡,沉淀不消失。下列分析正确的是
A.
原固体混合物中一定不含有CaCl 2 、KCl
B.
原固体混合物中一定含有K 2 CO 3 、K 2 SO 4 、KCl
C.
只通过步骤①②就可以确定原固体混合物中一定含有K 2 SO 4
D.
若步骤②改为滴加过量的Ba(NO 3 ) 2 溶液,其余操作及现象均不变,则原固体混合 物中一定含有KCl
【简答题】党员除了享有表决权、选举权和被选举权以外,还有权要求什么?
【简答题】已知一个二次函数的图象为抛物线C,点P(1,-4)、Q(5,-4)、R(3,0)在抛物线C上. (1)求这个二次函数的解析式. (2)我们知道,与y=kx+b(即kx-y+b=0)可以表示直线一样,方程x+my+n=0也可以表示一条直线,且对于直线x+my+n=0和抛物线y=ax 2 +bx+c(a≠0),方程组 x+my+n=0 y=a x 2 +bx+c 的解(x,y)作为点的坐标,所确定的点...
【单选题】某同学为探究 NaHCO 3 的性质进行如下实验:常温下测得 0.10 mol·L - 1 NaHCO 3 溶液的 pH 为 8.4 ;取 NaHCO 3 溶液向其中滴加 CaCl 2 溶液至 pH= 7 ,滴加过程中产生白色沉淀,但无气体放出。下列 分析正确 的是
A.
.反应的离子方程式 : HCO 3 ﹣ + Ca 2+ → CaCO 3 ↓ + H +
B.
.加入 CaCl 2 促进了 HCO 3 ﹣ 的电离,没有影响 HCO 3 ﹣ 的水解
C.
.反应的离子方程式 : 2 HCO 3 ﹣ + Ca 2+ → CaCO 3 ↓ + H 2 CO 3
D.
.反应后的溶液中存在: c (Na + ) + 2 c (Ca 2+ ) = c (HCO 3 ﹣ ) + c (Cl ﹣ )
【简答题】动圆P与定圆O 1 :x 2 +y 2 +4x-5=0和O 2 :x 2 +y 2 -4x+3=0均外切,设P点的轨迹为C. (1)求C的方程; (2)过点A(3,0)作直线l交曲线C于P、Q两点,交y轴于M点,若 MA = λ 1 MP = λ 2 MQ 当λ 1 +λ 2 =m时,求m的取值范围.
【单选题】向某盐溶液中通入过量Cl 2 无明显现象,滴加Ba(NO 3 ) 2 溶液和稀HNO 3 后,有白色沉淀生成,则原溶液可能是(  )
A.
AgNO 3 溶液
B.
CaCl 2 溶液
C.
Na 2 SO 3 溶液
D.
Na 2 CO 3 溶液
【判断题】向某无色溶液中滴入CaCl2溶液,有白色沉淀产生,说明该溶液中一定含有碳酸盐。
A.
正确
B.
错误
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