单项选择题

The most important thing in providing first aid is to ______.

A．call for an ambulance
B．prevent bleeding
C．know what to do
D．act quickly
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单项选择题
Which of the following is TRUE according to the passage
A．One should not apply first aid to the injured without knowing the ease of the accident.
B．It is easy to carry out first aid if one has the necessary facilities.
C．First aid is an important part of the whole treatment.
D．First aid may not be effective before a doctor or expert comes.
单项选择题
While offering first aid, the helper should ______.
A．be self-controlled
B．have others to assist him
C．have confidence in the sick person
D．get rid of the by-standers
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