简述班主任应具备的基本素质。
参考答案：
It's a lovely day today. Let's go and have a picnic, _______? [ ]
A. will you
B. shall we
C. aren't you
D. don't we
在流量测验中，流速仪是用来（）的仪器。
A、测量
B、测深
C、测速
D、测宽
