单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

[A] 15.
C. 135.
B. 50.
D. 150.
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单项选择题
The author indicates that a passenger-side air bag ______.
A．might not be dangerous if switched off
B．is designed for the safety of children
C．is discharged at 320 km/h and will not triggered by other factors
D．is not working if a child sits in the seat
单项选择题
[A] basic [C] healthy [B] wealthy [D] potential
[A] basic [C] healthy
[B] wealthy [D] potential
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