问题
多项选择题
关于实验方法的说法中，正确的是（）。
A.选取的实验组和对照组尽量具有同等的条件
B.常用随机法和配对法来选取实验对象
C.随机法比配对法科学，应该常用
D.狭义上的实验法是仅仅在实验室里的实验
E.实验法由实验者、研究对象和实验手段组成
答案
参考答案：A, B, D, E
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关于实验方法的说法中，正确的是（）。
A.选取的实验组和对照组尽量具有同等的条件
B.常用随机法和配对法来选取实验对象
C.随机法比配对法科学，应该常用
D.狭义上的实验法是仅仅在实验室里的实验
E.实验法由实验者、研究对象和实验手段组成
参考答案：A, B, D, E
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| Some people think that all wild animals are dangerous. But in fact, very few of them will 1 a man if he leaves them alone. If you meet a lion or an elephant, I guess you will 2 ; but even a lion will avoid (躲避) a man if it is not very 3 . Lions and tigers only kill and eat men when they have grown too old and too weak to catch their usual 4 , such as deer and 5 small animals. If you see a wild elephant, perhaps you will be 6 . However, elephants usually run away at once if you don't attack them. Some animals get very frightened if they only smell a man, some stand and look at him for a moment 7 they run away, some take no notice at all but walk away 8 in another direction. Wild animals only attack 9 when they are afraid that people want to harm their 10 , or when the hunters shoot at them and make them angry. | ||||
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