击实功不变而细粒土中粗颗粒含量增加时其最佳含水率是（）。
A.不变
B.增加
C.降低
参考答案：C
根据对话内容，在每小题的空白处填入适当的话语，使对话意思完整。
Paul: Who’s that girl over there?
Chris: 小题1:________________ Her name is Christine.
Paul: Why has she got so many things in her hands?
Chris: 小题2:_____________ My sister wants to cook a big meal for her.
Paul: Your mum’s birthday? Today? Oh, say “Happy birthday” to her for me.
Chris: 小题3:_____________
Paul: By the way, 小题4:_______________
Chris: She bought noodles, meat, and vegetables.
Paul: Wow, your sister must be an excellent cook.
Chris: 小题5:______________
低能炸药
