单项选择题

The underwater listening system was originally designed ______.

A．to trace and locate enemy vessels
B．to monitor deep-sea volcanic eruptions
C．to study the movement of ocean currents
D．to replace the global radio communications network
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单项选择题
According to the author, which of the following is NOT true
A．Most countries do not have an effective law on organ transplantation.
B．The traditional way of asking for permission of relatives for organ removal does not prove to be always feasible.
C．It is hard to understand why people should remain silent on compulsory postmortem exam after unexpected death.
D．In some countries there are laws providing that the permission of organ removal is taken for granted unless it has been refused by the person in his lifetime.
单项选择题
Which of the following is NOT a suggestion made in the passage
A．People should be encouraged to donate their organs after death.
B．Organ removal should be permitted in the course of compulsory postmortem exam.
C．Organ removal for transplantation should be advocated because it benefits the hu- man society.
D．Organ removal for transplantation could be considered legal unless the dead person stated otherwise in his lifetime.
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