机动车上路行驶时，前排乘车人可不系安全带。
参考答案：错
In view of all sorts of rumors and guesses, experts carried out some careful and scientific research and_____ the possibility of a second earthquake in this area.
A．blamed
B．discounted
C．attended
D．charged
对于包装产成品的包装物的需求，属于（）
A.直接需求
B.间接需求
C.相关需求
D.独立需求
uesses, experts carried out some careful and scientific research and_____ the possibility of a second earthquake in this area.