单选题：Which of the following is NOT mentioned in Paragraph 6？

题目分类：理工类
题目类型：单选题
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题目内容：

Which of the following is NOT mentioned in Paragraph 6？ A．An external camera checks that the car is going properly．
B．The car will automatically keep to its lane．
C．The seat belt will tighten when the driver is found drowsy．
D．The technology of the alcohol odor sensor should be improved．

参考答案：

答案解析：

Paragraph 4_______________

Paragraph 4_______________

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