问题 单项选择题

安全气囊等在发动机正常运转的时候点亮证明()

A、系统没有故障

B、系统有故障

C、气囊爆炸

D、没有气囊

答案

参考答案:B

问答题

商鞅变法的内容 、作用

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

单项选择题