搜题请搜索小程序“爱下问搜题”
问题 选择题

下列有关化学反应过程或实验现象的叙述中，正确的是（  ）

A．氨气的水溶液可以导电，说明氨气是电解质

B．漂白粉和明矾都常用于自来水的处理，二者的作用原理是相同的

C．在滴有酚酞的Na2CO3溶液中慢慢滴入BaCl2溶液，溶液的红色逐渐褪去

D．氯气可以使湿润的有色布条褪色，说明氯气具有漂白作用

答案

答案：C

A错，氨气属于非电解质；B错，漂白粉净水原理为强氧化性，明矾净水为生成了氢氧化铝胶体，胶体的吸附作用净水；C正确；D错，氯气本身无漂白性，只有与水反应生成了HCLO，HCLO具有漂白性；

听力题

单词拼写（每小题1分，满分10分）

小题1:Nantong is in the east of Jiangsu P___________.

小题2:By working hard, he received a college d_________ at last.

小题3:Every year the scientists went to the university to have a__________ （学术的）discussion.

小题4:T_________（青少年） have similar tastes in dress.

小题5:It’s a pity that he doesn’t seem very e_______（热心的） about the suggestion.

小题6:The harder the young students work, the more ______________ (精力充沛的) they become.

小题7:In the case of a highly ___________ (聪明) animal, elementary training is easy.

小题8:He told us the best way to earn _____ (尊敬) from other students was to achieve high grades.

小题9:It was a________ to watch the trained elephants perform magic tricks.

小题10:Our bodies are strengthened by taking exercise. S_______, our minds are developed by learning.
查看答案
单项选择题

下列哪个部位的病变常引起永久性尿崩症()

A．排尿中枢

B．正中隆突以下的垂体柄至神经垂体

C．下丘脑正中隆突以上部位

D．第三脑室

E．脑干
查看答案