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【单选题】
已知数列{a n }的通项公式 a n = n 2 -3n-4(n∈ N * ) ，则a 4 等于（ ）A.
1
B.
2
C.
0
D.
3
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举一反三
【单选题】We can infer by this label that ______.
A.
the medicine could cause some people to feel nervous
B.
children may take the same dosage as s take
C.
one may not take this medicine before going to bed
D.
the medicine is liquid
【单选题】We can infer by this label that______.
A.
The medicine could cause some people to feel nervous.
B.
Children may take the same dosage as s take
C.
One may not take this medicine before going to bed
D.
the medicine is liquid
【单选题】What can we infer from the assertion that 'corporations were competing to see which could provide the most mediocre health care coverage' 9
A.
Some benefits packages for full-time employees have already been a standard for freelancers.
B.
Those who provide lesser health care coverage will be degraded in the industry evaluation.
C.
Some companies use mediocre health care coverage as an edge in attracting freelancers.
D.
It is a common practice for the companies not to provide adequate health care coverage for freelancers.
【单选题】What can we infer from the passage?
A.
Human's future could be depended on advance in medical science.
B.
We could introduce certain kind of disease to control the number of some species.
C.
Human could control diseases.
D.
Introduction of the myxomatosis could control rabbit population in the world.
【单选题】We can infer from the passage that if psychologists could prescribe, ______.
A.
it would lead to broader third party payment
B.
they would be looked upon more favorably
C.
their caseload would increase
D.
they might become more influenced by the use of drugs
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