若方程2x2a＋b－4＋4y3a－2b－3＝1 是关于x、y的二元一次方程，则a，b的值分别是_____
2，1
根据汉语意思，选择合适的句子。
1. 这是学校的菜单。 [ ]
A. Here is a school menu.
B. Here is a school bag.
C. Here is a school.
2. 我想吃西红柿和青豆。[ ]
A. I'd like potatoes and green beans.
B. I'd like eggplant and green beans.
C. I'd like tomatoes and green beans.
3. 你星期三午餐吃什么？[ ]
A. What do you have for lunch on Wednesdays?
B. What would you like for lunch on Wednesdays?
C. What do you do on Wednesdays.
4. 听起来很不错！[ ]
A. That's great!
B. That sounds good!
C. That's right!
企业的人员获取主要依靠外部招聘，但内部挖潜也很重要。
