深度积分采样是指在一定地点,从水体不同()间歇或连续采集而得到的混合水样。深度积分法采集的水样为()水样。
A、深度;综合
B、时间;综合
C、垂线;混合
D、断面;混合
参考答案:A
决策支持系统的目标是 【9】 人们对重大问题的决策。
用括号内所给动词的适当形式填空。
1. It _ (be) very windy yesterday. So we had to stay at home.
2. —Did you _ ( go) to the park last week?
—Yes, I _ ( do).
3. His funny joke _ ( make) me laugh yesterday.
4. I am __ (real) sorry. I'm late.
5. He often _ ( play) basketball with his classmates.