为满足填方工程施工质量要求，填土的控制含水量应控制在下列哪个（）。A.ws±2% B

表格中所列数据是测量小灯泡 U-I关系的实验数据：

U（V）	0.0	0.2	0.5	1.0	1.5	2.0	2.5	3.0
I（A）	0.000	0.050	0.100	0.150	0.180	0.195	0.205	0.215

（1）分析上表内实验数据可知，应选用的实验电路图是图______（填“甲”或“乙”）；

（2）在方格纸内画出小灯泡的U-I曲线．分析曲线可知小灯泡的电阻随I变大而______（填“变大”、“变小”或“不  变”）； 

（3）如图丙所示，用一个定值电阻R和两个上述小灯泡组成串并联电路，连接到内阻不计、电动势为3V的电源上．已知流过电阻R的电流是流过灯泡b电流的两倍，则流过灯泡b的电流约为______A．

完形填空。

A young man was getting ready to graduate from college. He had wanted a beautiful   1   in a dealer's showroom, and knowing his father could well   2   it, he told him that was all he wanted.      As Graduation Day came near, the young man expected   3   that his father had bought the gift   4    on the morning of his graduation, his father called him into his own   5  . His father told him how proud he was to have such a fine son, and told him how much he loved him. He   6   his son a beautiful wrapped gift box.      Curious, and somewhat   7  , the young man opened the box and found a lovely leather-bound Bible, with the young man's name written in gold. Angry, he   8   his voice to his father, and said, "With all your money you give me a Bible?" and   9   out of the house.      Many years passed and the young man was very  10  in business. He had a beautiful home and a wonderful family, but  11  his father was very old, and thought perhaps he should go to see him.  12  he could make arrangements, he received a telegram  13  him his father had passed away and willed all of his  14  to him. When he arrived at his father's, sudden sadness and regret  15  his heart. He began to  16  his father's important papers and saw the still new gift-wrapped Bible, just as he had  17  it years ago. With tears, he opened the Bible and began to turn the pages. His father had carefully  18  a verse (诗), Matthew 7-11, "And if you, being evil, know how to give good gifts to your children, how much more shall your Heavenly Father who is in Heaven, give to those who ask him?"      As he read those words, a car key  19  from the back of the Bible. It had a tag (标签) with the dealer's name, the same dealer who had the sports car he had desired. On the tag was the  20  of his graduation, and the words: PAID IN FULL.

( )1. A. computer  ( )2. A. pay       ( )3. A. signs     ( )4. A. However   ( )5. A. house     ( )6. A. gave      ( )7. A. excited   ( )8. A. raised    ( )9. A. ran       ( )10. A. busy      ( )11. A. remembered    ( )12. A. When      ( )13. A. informing ( )14. A. treasures ( )15. A. filled    ( )16. A. pick up   ( )17. A. seen      ( )18. A. made      ( )19. A. dropped   ( )20. A. year      B. bike          B. buy         B. facts        B. Finally      B. room          B. handed       B. nervous       B. changed    B. went         B. successful   B. realized     B. As            B. announcing    B. possessions       B. caught       B. remind of    B. got         B. written     B. appeared       B. date      C. car              C. support        C. marks           C. Quietly          C. study            C. showed          C. interested       C. improved     C. walked          C. comfortable        C. knew           C. After         C. telling         C. clothing          C. attacked         C. search through      C. left        C. underlined      C. rolled              C. moment      D. recorder       D. afford      D. results         D. Actually        D. office         D. presented       D. disappointed   D. increased      D. stormed         D. happy           D. considered                    D. Before      D. discovering     D. eagerness       D. beat         D. refer to         D. thrown       D. designed       D. showed           D. day

汽车以额定功率在平直公路上匀速行驶，在t₁时刻突然使汽车的功率减小一半，并保持该功率继续行驶，到t₂时刻汽车又开始做匀速直线运动（设汽车所受阻力不变）。则在t₁～t₂时间内 [ ]

A．汽车的加速度保持不变

B．汽车的加速度逐渐减小

C．汽车的速度先减小后增大

D．汽车的速度先增大后减小

下列关于人体内电突触传递的描述，正确的是（）

A.结构基础是离子通道

B.传递速度慢，潜伏期长

C.允许大分子带电物质通过

D.一般为单向传递

E.主要发生在同类神经元之间

《食品安全国家标准食品添加剂使用标准》发布日期为（）。

A.2011.6.20

B.2011.4.20

C.2011.5.18

D.2011.3.20