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【单选题】
实验研究的三个基本要素是A.
受试对象、处理因素、实验效应
B.
随机化、重复、设置对照
C.
均衡性、随机化、可比性
D.
受试对象、实验效应、观察指标
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举一反三
【单选题】-Need I do the repairs now? Yes,_________.
A.
you need:;but you need ask someone to help you
B.
you must;but you can ask someone to help you
C.
you need; but you can ask someone to help you
D.
you must:;but you need ask someone to help you
【简答题】人类首先提出对宇宙比较科学的认识是：（）
【单选题】--Need I clean the room now? --Yes, you ___, but you ___ ask someone to help you.
A.
need, need
B.
must, can
C.
need, can
D.
must, need
【简答题】I don't want a lot for Christmas There is just one thing I need I don't care about the 1 Underneath the Christmas tree I just want you for my own More than you could ever know Make my wish 2 oh All I ...
【简答题】 Dialogue 7 A : Good morning. What’s the matter? B : 1 A : Do you have a headache? B : Yes, I do. A : Open your mouth and say “Ah”. B : Ah. A : 2 B : No, I didn’t. I felt terrible last night. A : Oh,...
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