问题
选择题
需要保存在棕色试剂瓶中的试剂是（ ）
A．氯水
B．NaCl溶液
C．NaOH溶液
D．稀硫酸
答案
答案：A
搜题请搜索小程序“爱下问搜题”
需要保存在棕色试剂瓶中的试剂是（ ）
A．氯水
B．NaCl溶液
C．NaOH溶液
D．稀硫酸
答案：A
| 选词填空。 | |
others. But some people aren't 2_____ to saying "Thank you" after they have got help from others. They think an easy "Thank you" doesn't really matter. However, it's very important. You may have many choices to express your grateful feelings. But 3_____, you should learn to say "Thank you" first. No matter how nicely we dress, how beautifully we decorate our homes, how exciting our dinner 4_____ are, we can't be popular without good manners (礼貌). I think of them as a kind of hidden beauty secret. Haven't you noticed that the kindest people keep 5_____ more beautiful? The habit of saying "Thank you" can make us feel good and become polite to everyone else around us. |