单项选择题

Which of the following is NOT a perceived advantage of alliances

A．Baggage allowance.
B．Passenger comfort.
C．Convenience.
D．Quality.
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单项选择题
Which of the following statements about ESA's protection efforts is NOT true
A．ESA plans to extend its protection to the endangered fish in other areas.
B．It will be expensive to apply ESA's regulations for protecting the fish.
C．The new listings will Somewhat affect the urban life of some regions.
D．ESA's protection planshave always been supported by local people.
单项选择题
According to the introductions about the endangered fish, we can infer that mostPacific salmon and steelhead
A．always live in rivers and streams without going to seas.
B．always live in seas and oceans without going to rivers.
C．live in rivers when young and live in seas when grown-up.
D．live in seas when young and live in rivers when grown-up.
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