A:溴乙烷中滴入AgNO3溶液检验其中的溴元素:Br-+Ag+==AgBr↓
B:用醋酸除去水垢:CaCO3 + 2H+==Ca2+ + H2O + CO2↑
C:利用腐蚀法制作印刷线路板:Fe3+ + Cu ='=' Fe2+ + Cu2+
D:实验室用液溴和苯在催化剂作用下制溴苯:
补全表格中所缺信息。
Cathy's problem
◎She feels sad because she has____every day.
ZhangMei's advice
◎Talk to others,such as parents,____or friends.
◎Listen to music because music can make people feel____.
◎____.It's a good way to forget about homework.
◎Try to____classmates.
—________ is today? —It's Monday.
下列对绿色植物各种生理活动的叙述,错误的是( )