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【单选题】
按照机遇的原则进行抽样或分组,使各受试对象被分配到各组的机会均等,而不受主观因素的影响称为
A.
对照原则
B.
随机化原则
C.
重复原则
D.
单一原则
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
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举一反三
【单选题】一Everybody is going to climb the mountain. Can I go too, mum? —__________Wait till you are old enough, dear．
A.
will you?   
B.
Why not?    
C.
I hope so     D.I’m afraid not
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【判断题】Michelle is old enough to do activities in New York.
A.
正确
B.
错误
查看完整题目与答案
【简答题】某双原子理想气体1mol从始态 350K , 200KPa 经过如下五个不同过程达到各自 的平衡态,求各过程的功。 (1)恒温可逆膨胀到 50kPa ; (2)恒温反抗 50kPa 恒外压不可逆膨胀; (3)恒温向真空膨胀到 50kPa ; (4)绝热反抗 50kPa 恒外压不可逆膨胀。
查看完整题目与答案
【单选题】The panda is 20 months old now. She is _____ look after herself. [     ]
A.
old enough
B.
enough old
C.
enough old to
D.
old enough to
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【单选题】研究发现，市面上的X饮料的Y成分可以抑制鼻病毒．实验证实，鼻病毒是引发感冒的罪魁祸首．因此，经常喝X饮料的人将减少引发感冒的风险． 以下哪项如果为真，最能削弱上述观点？( )
A.
不同条件下的实验，可以得出类似的结论
B.
已经感冒的患者喝了X饮料后并未发现病情好转
C.
Y成分可以抑制鼻病毒，也可以对人的免疫系统产生负面作用
D.
Y成分的作用可以被X饮料的Z成分中和
查看完整题目与答案
【多选题】what would Michelle Wie say to a 15-year-old Michelle Wie?
A.
work out
B.
have fun
C.
back in a schhedule
D.
learn as much as you can
E.
do whatever you want
F.
enjoy the experience enjoy the ride
G.
get your education
查看完整题目与答案
【简答题】作业:2.22某双原子理想气体1mol从始态350K,200kPa经过如下四个不同过程达到各自的平衡态,求各过程的功W。 (1)恒温可逆膨胀到50kPa; (2)恒温反抗50kPa恒外压不可逆膨胀; (3)绝热可逆膨胀到50kPa; (4)绝热反抗50kPa恒外压不可逆膨胀。
查看完整题目与答案
【单选题】According to the passage, Susan Tully is sorry for Michelle because Michelle has to______
A.
grow old quickly
B.
catch up on her schoolwork
C.
write many letters every day
D.
work late in the evening
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【单选题】Natalie, Michelle and Anthony have to be at school by 8:45 a.m. Michelle is never late for school. On Monday Anthony was late for school. If these statements are true, only one of the sentences below ...
A.
Natalie is sometimes late for school.
B.
Anthony sometimes arrives after Michelle.
C.
Natalie sometimes arrives after Michelle.
D.
Anthony always arrives after Michelle.
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【判断题】Michelle and her friends are between ten and twelve years old.
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】一Everybody is going to climb the mountain. Can I go too, mum? —__________Wait till you are old enough, dear．
A.
will you?   
B.
Why not?    
C.
I hope so     D.I’m afraid not
查看完整题目与答案
【判断题】Michelle is old enough to do activities in New York.
A.
正确
B.
错误
查看完整题目与答案
【简答题】某双原子理想气体1mol从始态 350K , 200KPa 经过如下五个不同过程达到各自 的平衡态,求各过程的功。 (1)恒温可逆膨胀到 50kPa ; (2)恒温反抗 50kPa 恒外压不可逆膨胀; (3)恒温向真空膨胀到 50kPa ; (4)绝热反抗 50kPa 恒外压不可逆膨胀。
查看完整题目与答案
【单选题】The panda is 20 months old now. She is _____ look after herself. [     ]
A.
old enough
B.
enough old
C.
enough old to
D.
old enough to
查看完整题目与答案
【单选题】研究发现，市面上的X饮料的Y成分可以抑制鼻病毒．实验证实，鼻病毒是引发感冒的罪魁祸首．因此，经常喝X饮料的人将减少引发感冒的风险． 以下哪项如果为真，最能削弱上述观点？( )
A.
不同条件下的实验，可以得出类似的结论
B.
已经感冒的患者喝了X饮料后并未发现病情好转
C.
Y成分可以抑制鼻病毒，也可以对人的免疫系统产生负面作用
D.
Y成分的作用可以被X饮料的Z成分中和
查看完整题目与答案
【多选题】what would Michelle Wie say to a 15-year-old Michelle Wie?
A.
work out
B.
have fun
C.
back in a schhedule
D.
learn as much as you can
E.
do whatever you want
F.
enjoy the experience enjoy the ride
G.
get your education
查看完整题目与答案
【简答题】作业:2.22某双原子理想气体1mol从始态350K,200kPa经过如下四个不同过程达到各自的平衡态,求各过程的功W。 (1)恒温可逆膨胀到50kPa; (2)恒温反抗50kPa恒外压不可逆膨胀; (3)绝热可逆膨胀到50kPa; (4)绝热反抗50kPa恒外压不可逆膨胀。
查看完整题目与答案
【单选题】According to the passage, Susan Tully is sorry for Michelle because Michelle has to______
A.
grow old quickly
B.
catch up on her schoolwork
C.
write many letters every day
D.
work late in the evening
查看完整题目与答案
【单选题】Natalie, Michelle and Anthony have to be at school by 8:45 a.m. Michelle is never late for school. On Monday Anthony was late for school. If these statements are true, only one of the sentences below ...
A.
Natalie is sometimes late for school.
B.
Anthony sometimes arrives after Michelle.
C.
Natalie sometimes arrives after Michelle.
D.
Anthony always arrives after Michelle.
查看完整题目与答案
【判断题】Michelle and her friends are between ten and twelve years old.
A.
正确
B.
错误
查看完整题目与答案