问题 多项选择题

SRAS病原体是一种冠状病毒,其遗传物质是一条单链RNA,下列关于SARS病毒的叙述中,正确的是()

A.可独立生活和复制

B.DNA和RNA同时存在

C.能在寄主细胞内繁殖

D.没有细胞器

答案

参考答案:C, D

辨析题

2008年初的罕见冰冻,导致了很多送电线路受损,不能供电,严重影响人民群众的生产生活。湖南省电力公司工人罗海文、罗长明、周景华在高压线路上人工除冰时,不幸殉职。这三位工人这样献出生命不值得。

                                                                                                                                                              

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                            

单项选择题