【单选题】There ____ a cat and two birds in front of the house.
【多选题】总的来说,各种抽样都可以归为( )两大类。
【单选题】理论上抽样方法的种类很多,主要分为概率抽样和()
【单选题】A : Are there two birds in the tree? B : Yes, ....
【单选题】There_____two birds and a dog in the garden.
【单选题】There_____a dog and two birds in the garden.
【单选题】山区道路车辆进入弯道前,在对面没有来的情况下,()。
【判断题】根据抽选样本的方法,抽样调查可以分为概率抽样和非概率抽样两类,两种类型都依赖于调查人员的个人判断。
【单选题】There_____two birds and a cat in front of the house.
【简答题】There ____ a cat and
two birds in front of the house .A. are B. is C. am