配制碘标准溶液应保存在()。
A、白色瓶中
B、白色瓶暗处
C、棕色瓶暗处
D、阴暗处
参考答案:C
属升浮药性的“性味”是()
A.甘、苦,寒
B.酸、苦,温
C.辛、苦,寒
D.辛、甘,温
E.辛、甘,寒
看看你的应变能力,用所给单词的适当形式填空。
1.It's important for us ____ (study)English well.
2.English ___ (help)us know how to communicate with the world.
3.We would like ___ (read) the article.
4.You'd better ___ (not tell)him the news.
5.My parents often encourages me ___ (try)new things.