若对一项政策评估所能花费的金钱较少,那么应采取的方法是()。
A.非随机试验法
B.抽样调查法
C.问卷调查法
D.随机试验法
参考答案:C
同义句转化。
1. These are Tony’s parents.
These are Tony’s ______ and .
2. They are that factory workers.
They ______ in that ______ .
3. What is your father?
What ______ your father’s ______?
4. I’m American.
I’m ______ .
5. My name’s Betty.
______ is name.
下面哪个不是寻呼指示因子长度的取值范围()
A.2
B.4
C.8
D.16