单项选择题

What is the main point of the passage

A．To warn people of the dangers of atomic power.
B．To describe the heroism of Louis Slotin.
C．To make a statement about what morality means.
D．To express the author's view of a scientist's duty.

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单项选择题

Slotin did not call the hospital for help until ______.

A．the screwdriver slipped
B．a chain reaction began
C．he apologized to his co-workers
D．he calmly handled the accident

单项选择题

The main idea of the passage is that______.

A．more students cheat on exams now than in the past
B．each era has a different concept of honour
C．there are still many individuals today who have a sense of honour
D．our society no longer values a sense of honour