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问题 多项选择题

公路根据功能和适应的交通量可分为五个等级，下列关于五个公路等级的叙述，正确的有（）。

A．高速公路为专供汽车分向、分车道行驶并应控制出入的多车道公路

B．一级公路为供汽车分向、分车道行驶并可根据需要控制的多车道公路

C．二级公路为供汽车行驶的双车道公路

D．三级公路为主要供汽车行驶的双车道公路

E．四级公路为仅供汽车行驶的双车道公路

答案

参考答案：A, B, C, D

选择题

The students __________ loudly when the teacher came in.[ ]

A. talked

B. talking

C. were talking

D. to talk
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单项选择题

A conscious victim who has suffered a blow to the head has symptoms that indicate the possibility of concussion. If the patient feels no indication of neck or spine injury，recommended treatment would include（）.

A.turning the victim's head to the side to keep his airway open

B.positioning the victim so the head is lower than the body

C.giving the victim water if he is thirsty，but no food

D.elevating the head and shoulders slightly with a pillow
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