问题
选择题
一化学兴趣小组在家中进行化学实验，按照下（左）图连接好线路发现灯泡不亮，按照下图（右）连接好线路发现灯泡亮，由此得出的结论正确的是
A．NaCl是非电解质
B．NaCl溶液是电解质
C．NaCl在水溶液中电离出了可以自由移动的离子
D．NaCl溶液中水电离出大量的离子
答案
答案：C
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一化学兴趣小组在家中进行化学实验，按照下（左）图连接好线路发现灯泡不亮，按照下图（右）连接好线路发现灯泡亮，由此得出的结论正确的是
A．NaCl是非电解质
B．NaCl溶液是电解质
C．NaCl在水溶液中电离出了可以自由移动的离子
D．NaCl溶液中水电离出大量的离子
答案：C
| 完形填空。 |
| Last Sunday morning, Yang Ling, Helen and I ① to a supermarket to ② shopping. Suddenly I ③ a thin man beside a woman. He ④ her purse ⑤ her bag and then ran out ⑥ the supermarket. I ⑦ Yang Ling and Helen to ⑧ ll0. I ran after the man and shouted. "Stop thief! Stop thief!" The thief ⑨ me and ran faster. Some people helped me to run after the thief. At that time, a police wagon (警车) came and ⑩ the thief. "Great, Liu Tao !" A police officer said to me. |
| （ ）①A. go （ ）②A. do （ ）③A. see （ ）④A. stole （ ）⑤A. to （ ）⑥A. of （ ）⑦A. tell （ ）⑧A. call （ ）⑨A. hear （ ）⑩A. catch | B. are going B. did B. saw B. is stealing B. with B. from B. telled B. calling B. heared B. caught | C. goes C. does C. seeing C. steals C. from C. to C. told C. calls C. heard C. catches | D. went D. doing D. sees D. steal D. to D. at D. telling D. called D. hearing D. to catch |