太阳光通过三棱镜后，分解为七色光，这是_________现象。光的“三基色”是指

下列词语书写无误的一项是 [ ]

A．元霄  绽裂  扎针  不同凡响  

B．驾驭  老茧  许愿  呱呱堕地  

C．勒断  尖锐  熏陶  腰缠万惯  

D．筵席  隐匿  憋闷  威风凛凛

阅读短文，选择正确答案。

      Could you be a genius like Einstein? A genius needs to learn and think. Reading is a good idea, but it is not

enough. Einstein's advice is to use your brain more. Here are some tips:

      # Ask. When you look at new things, ask why they are new or different. Ask questions. Ask yourself and

ask others. Keep thinking until you find the answer.

      # Draw. Einstein thought in pictures. Sometimes, it helps to draw problems and ideas.

      # Read. Try to read new things. Read books from different parts of the library. After you read, think about

the ideas you have learned. Are they different from what you thought?

      # Relax. Many ideas come when you are relaxed. Take some time to relax yourself in the ways like taking

a walk in a park, going to a concert or a museum.

      # Write. Keep a diary. Write down your questions and ideas. Write down new ideas after you read.

      # Share. Einstein used to talk to his friends and explain his ideas. Sometimes, a friend can help you find the

answer to a problem.

      # Be brave. Do not let other people say your ideas are silly. Explain yourself. Let other people explain why

they think you are wrong. Then decide.

1. How many tips are there in this passage? [ ]

A. Five.

B. Six.

C. Seven.

D. Eight.

2. What can we do to relax ourselves from the passage? [ ]

A. Keeping a diary.

B. Asking questions.

C. Taking a walk.

D. Reading new things.

3. Einstein suggested we should _______ if other people say our ideas are silly. [ ]

A. discuss the ideas with others

B. draw problems and ideas

C. go to a museum with others

D. write down your ideas

4. Which of the following is NOT true according to the passage? [ ]

A. A genius needs to learn and think.

B. We should find the answers all by ourselves.

C. Einstein's advice is to use our brain more.

D. Einstein liked to talk to his friends and explain his ideas.

（2011年福建福州，17题）某课外活动小组同学用图12装置（固定装置未画出）测定含有杂质的镁带中镁单质的质量分数（杂质与酸接触不产生气体）。实验过程是：

①取一段镁带样品，准确称得其质量为0.030g。

②往量气管内装水至低于刻度“0”的位置。按图12所示（未装药品）装配好仪器。

③检查装置气密性。

④在试管中加入足量的稀硫酸，稍倾斜试管，将用水湿润的镁带小心贴在试管壁上，塞紧橡皮塞。

⑤调整量气管液面，使两边的液面保持同一水平，记录量气管中液面位置。

⑥把试管底部略为抬高，使镁带与稀硫酸接触完全反应。

⑦待冷却至室温后，再次记录量气管中液面位置。

⑧算出量气管中增加的气体体积为23.96mL。

已知：同温同压下，不同气体混合后体积等于混合前各气体体积之和。

请回答下列问题：

（1）写出镁与稀硫酸反应的化学方程式                                       。

（2）能否用托盘天平称量0.030g镁带样品              。（填“能”或“不能”）

（3）若不改变温度，如何用简单的方法检查图12所示装置的气密性？

（4）经换算，该实验获得的氢气质量为0.0020g。该镁带中单质镁的质量分数是           。

（5）实验过程⑦中再次记录量气管的液面位置时，试管中留有氢气，是否会影响实验最终结果       （填“是”或“否”）。理由是                                          。

俄罗斯的国土横跨亚洲和欧洲两大洲（）。

A.正确

B.错误

“三言”是经（）加工编纂完成的。

A.刘义庆

B.兰陵笑笑生

C.冯梦龙

D.钱谦益