由单项式的系数及其次数的定义可知，单项式-3xy24的系数是-34，次数是3．
故答案为：-34，3．
根据对话，在横线上写出动词词组。
A: Hi, Ben! It was National Day holiday last week. What did you do?
B: On Monday I watched a film with my family. On Tuesday and Wednesday I was at a camp. I played football
with my family. On Thursday I played computer games with my friends. On Friday and Saturday I visited my
uncle and aunt. They're farmers. On Sunday I stayed at home and watched TV.
A: Wow, you were busy.
1. Sunday 2. Monday
3. Tuesday 4. Wednesday
5. Thursday 6. Friday
7. Saturday
适用于少数保密性很强的建设工程的招标方式是()。
A.公开招标
B.邀请招标
C.协议招标
D.电视招标
