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【单选题】
Read the following passage and identify the problem in the causal reasoning. Oranges to combat the blues. Researchers have recently revealed that eating two oranges a day can help alleviate depression. Researchers studied 13 patients who had feelings of depression. After three weeks of eating two oranges a day, 9 of the 13 people reported improvement in their condition. The researchers hypothesize （假设）that the citric acid and vitamin C in oranges help to stimulate serotonin (血清素) production helping to combat depression.
A.
Eating oranges is not the only reason for combating depression. There are many other obvious alternative explanations.
B.
There is no correlation between eating oranges and alleviating depression.
C.
Some patients who reported improvement in depression concealed their real physical condition.
D.
It’s hard to justify the sequence of eating oranges and relieving depression.
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【单选题】How exactly, does science work How do scientists go about doing science Ordinarily we think science proceeds in a straight-forward way. Ideally scientists make observations, formulate hypotheses (假设),...
A.
The research methods used by scientists.
B.
Observation and human perception variation.
C.
The relation between hypothesis and observation.
D.
The human perceptual mechanism.
【单选题】Factors for Stress and Anxiety At some point in their lives virtually everyone will experience stressful events or situations that overwhelm their natural coping mechanisms. In one poll, 89% of respo...
A.
two persons with different characteristics work together
B.
a person always recalls past painful experience
C.
a person has just get over a serious physical disease
D.
parents abuse their children too much in early nurturing
【单选题】在Excel中，假设B1、B2、C1、C2单元格中分别存放1、2、6、9，SUM(B1：C2)和AVERAGE(B1，C2)的值等于()。
A.
18，5
B.
10，5
C.
18，10
D.
10，10
相关题目：
【单选题】How exactly, does science work How do scientists go about doing science Ordinarily we think science proceeds in a straight-forward way. Ideally scientists make observations, formulate hypotheses (假设),...
A.
The research methods used by scientists.
B.
Observation and human perception variation.
C.
The relation between hypothesis and observation.
D.
The human perceptual mechanism.
【单选题】Factors for Stress and Anxiety At some point in their lives virtually everyone will experience stressful events or situations that overwhelm their natural coping mechanisms. In one poll, 89% of respo...
A.
two persons with different characteristics work together
B.
a person always recalls past painful experience
C.
a person has just get over a serious physical disease
D.
parents abuse their children too much in early nurturing
【单选题】在Excel中，假设B1、B2、C1、C2单元格中分别存放1、2、6、9，SUM(B1：C2)和AVERAGE(B1，C2)的值等于()。
A.
18，5
B.
10，5
C.
18，10
D.
10，10
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