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【单选题】
(单选)老师把参与实验的学生分成三个组,对每组学生完成任务的情况给予不同的强化,第一组用口头表扬,第二组用金钱奖励,第三组用加分。在这一研究中,自变量是:A.
数字变量
B.
类别变量
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知识点：
皮皮学刷刷变学霸
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【单选题】Reading the following t ext . A nswer the 1--5 questions by choosing A, B, C, or D. 阅读本材料,完成以下 1--5 题。 Passwords are everywhere in computer security. All too often, they are also ineffective. A good p...
A.
easy to remember
B.
hard to figure out
C.
random numbers
D.
popular names
【单选题】Researchers studying teenagers in Israel concluded that, in that hazardous environment, mobile phones were regarded as “security objects” in parent-teen relationships―important because they provided t...
A.
adventurous
B.
secure
C.
risky
D.
beneficial
【简答题】But researchers said that the situation was worsening and that the negative aspects were no longer offset by job security and the ability to work autonomously, flexibly and creatively.
【单选题】前倾坐位时易于闻及的是
A.
二尖瓣狭窄的舒张期杂音
B.
二尖瓣关闭不全的收缩期杂音
C.
主动脉瓣关闭不全的舒张期杂音
D.
三尖瓣关闭不全的收缩期杂音
E.
肺动脉瓣狭窄的收缩期杂音
【单选题】Most researchers reported having pride in their institutions and passion for their work, but spoke of the high personal toll of their environment. Many accepted that pressure and long hours came with ...
A.
Most researchers are substantially underpaid.
B.
Job security cannot cancel out adverse aspects.
C.
Most researchers have regular working hours.
D.
Scientists were no longer respected by the public.
【简答题】Researchers studying agers in Israel concluded that, in that ___9____ environment, mobile phones were regarded as "security objects" in parent- relationships - important
【单选题】前倾坐位时易于闻及的是
A.
二尖瓣狭窄的舒张期隆隆样杂音
B.
二尖瓣关闭不全杂音
C.
主动脉瓣关闭不全的叹气样杂音
D.
三尖瓣关闭不全杂音
E.
肺动脉瓣狭窄杂音UR
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