问题
选择题
清洗内壁粘有油污的试管要用到的是（ ）
A．酒精
B．稀盐酸
C．氯化钠溶液
D．洗衣粉
答案
根据清洗内壁粘有油污的试管要用试管刷和热的纯碱或洗衣粉水刷洗，刷洗时不能用力过猛，防止损坏试管；
故选D．
搜题请搜索小程序“爱下问搜题”
清洗内壁粘有油污的试管要用到的是（ ）
A．酒精
B．稀盐酸
C．氯化钠溶液
D．洗衣粉
根据清洗内壁粘有油污的试管要用试管刷和热的纯碱或洗衣粉水刷洗，刷洗时不能用力过猛，防止损坏试管；
故选D．
Food is very important. Everyone needs to 1 well if he or she wants to have a strong body. Our minds also need a kind of food. This kind of food is 2 . We begin to get knowledge(知识) even when we are very young. Small children are 3 in everything around them. They learn 4 while they are watching and listening. When they are getting older, they begin to 5 story books, science books..., anything they like. When they find something new, they love to ask questions and 6 to find out the answer. What is the best 7 to get knowledge? If we learn 8 ourselves, we will get the most knowledge. If we are 9 getting answers from others and do not ask why, we never learn well. When we study in the right way, we will learn more and understand 10 .
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