可用做少量试剂的反应容器的是( )
A.量筒
B.试管
C.滴管
D.烧杯
答案:B
从方框中选择合适的单词,并用其正确形式填空。
Jane is my good friend. She 1 from Canada. She speaks 2 . We are in the same class.
Many students in our class like English 3 , but I don't like it at all. My English is 4 , so she
often helps me 5 it. And I help her study Chinese. We help each other.
将3.42 g蔗糖与3.24 g淀粉混合并使其完全水解,若反应后生成m g葡萄糖和n g果糖,则n:m为 [ ]
A.1:3
B.3:1
C.1:5
D.5:1