The word it in the passage refers to
A. device.
B. film.
C. window.
D. sequence.
查看答案
It can be inferred from Paragraph 2 that the typical primary group
A. cannot supply everything an individual needs to be happy.
B. contains members that are emotionally healthy.
C. remains together for a long period of time.
D. does not encourage the formation of relationships outside the group.
What can be inferred from Paragraph 6 about a society with a high level of technological advancement？
A. Its primary groups are concerned mainly with acquiring material goods.
B. It is less common for people to commit to primary or secondary groups.
C. It allows its citizens to join more primary groups than those of other societies.
D. Its people form. secondary groups more often than primary groups.
Why does the author mention marine tourism？
A. To show how people's lives may be put in danger by the algae's growth.
B. To explain how human activities have encouraged the spread of Caulerpa taxifolia.
C. To contrast the impact on the tourism to what has happened in the commercial fishing industry.
D. To give an example of the effects that changed ecosystems have on humans.
The word feasible in the passage is closest in meaning to
A. practical.
B. comprehensive.
C. firm.
D. routine.
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