憎水性材料
参考答案：
是指当水分子之间的内聚力大于水分子与材料表面分子之间的吸引力时，材料表面不会被水浸润，此种材料称为憎水性材料。
根据句意及首字母提示在横线处填上恰当的单词，使句子意思完整，语法正确。
l. If I had a m_______dollars,1 would build a school for the poor children in the village.
2. Do you like wearing a shirt and t________to take part in a party?
3. They do medical r________with animals such as dogs and white mice.
4. There are many p_______on my face. They look very ugly. What should I do?
5. My only w______is that l won't be allowed to take a vacation with my parents.
6. I don't have a present. What i_______everyone else brings a present?
填土碾压，定额工程量计算按( )。
A．槽坑底面积B．槽坑延长米C．按图示填土厚度以立方米计算D．槽坑体积
