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Passage 2

For laymen ethnology is the most interesting of the biological sciences for the very reason that it concerns animals in their normal activities and therefore, if we wish, we can assess the possible dangers and advantages in our own behavioral roots. Ethnology also is interesting methodologically because it combines in new ways very scrupulous field observations with experimentation in laboratories.
The field workers have had some handicaps in winning respect for themselves. For a long time they were considered as little better than amateur animal-watchers--certainly not scientists, since their facts were not gained by experimental procedures: they could not conform to the hard-and-fast rule that a problem set up and solved by one scientist must be tested by other scientists, under identical conditions and reaching identical results. Of course many situations in the lives of animals simply cannot be rehearsed
A. are difficult and quick to follow
B. must be carried out in a strict and quick way
C. must be followed strictly to avoid false and loose results
D. hard and unreasonable for scientists to observe

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Passage 2

For laymen ethnology is the most interesting of the biological sciences for the very reason that it concerns animals in their normal activities and therefore, if we wish, we can assess the possible dangers and advantages in our own behavioral roots. Ethnology also is interesting methodologically because it combines in new ways very scrupulous field observations with experimentation in laboratories.
The field workers have had some handicaps in winning respect for themselves. For a long time they were considered as little better than amateur animal-watchers--certainly not scientists, since their facts were not gained by experimental procedures: they could not conform to the hard-and-fast rule that a problem set up and solved by one scientist must be tested by other scientists, under identical conditions and reaching identical results. Of course many situations in the lives of animals simply cannot be rehearsed
A. people who stand aside
B. people who are not trained as biologists
C. people who are amateur biologists
D. people who love animals

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Passage 2

For laymen ethnology is the most interesting of the biological sciences for the very reason that it concerns animals in their normal activities and therefore, if we wish, we can assess the possible dangers and advantages in our own behavioral roots. Ethnology also is interesting methodologically because it combines in new ways very scrupulous field observations with experimentation in laboratories.
The field workers have had some handicaps in winning respect for themselves. For a long time they were considered as little better than amateur animal-watchers--certainly not scientists, since their facts were not gained by experimental procedures: they could not conform to the hard-and-fast rule that a problem set up and solved by one scientist must be tested by other scientists, under identical conditions and reaching identical results. Of course many situations in the lives of animals simply cannot be rehearsed and controlled
A. a new branch of biology
B. an old Greek science
C. a pseudo-science
D. a science for amateurs

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[单项选择]For laymen ethnology is probably the most interesting of the biological sciences for the very reason that it concerns animals in their normal activities and therefore, if we wish, we can assess the possible, dangers and advantages in our own behavioral roots. Ethnology also is interesting methodologically because it combines in new ways very scrupulous field observations with experimentations in laboratories.
The field workers have had some handicaps in winning respect for themselves. For a long time they were considered as little better than amateur animal-watchers--certainly not scientists, since their facts were not gained by experimental procedures, they could not conform to the hard-and-fast rule that a problem set up and solved by one scientist must be tested by other scientists, under identical conditions and reaching identical results. Of course many situations in the lives of animals simply cannot be rehearsed and controlled in this way. The fall flocking of wild free bir
A. people who stand aside
B. people who are not trained as biologists
C. people who are amateur biologists
D. people who love animals

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[单项选择]Passage 2 Most single parents work outside the home; and in many two-parent families,both parents work. Unless working parents have been lucky enough to arrange a flexible schedule that allows them to be home when their children are not in school, they are not available to care for their children during the period immediately after school. The result is children of all ages being left to care for themselves after school. Young children in these families have been referred to as latchkey kids because they carry their own house key. Older students are more likely to care for themselves after school. Parents provide supervision (监管) after school for over half of the students in grades K-5. Other children stay with adults other than their parents, attend center-based programs, or take part in extracurricular activities (课外活动) such as sports, arts, or clubs. Children in poverty are slightly more likely to stay with relatives than other children; they are also less likely to ca
A. parentless kids
B. homeless kids
C. kids after school
D. kids at kindergarten

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