题干

恐龙的质量可达50t,则它的体重为____N,相当于____个质量为50kg的同学的体重.
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答案(点此获取答案解析)

4.9×105N,1000

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阅读古诗,完成练习。

                                                                                                        汉江 临 泛

                                                                                                         (唐) 王 维

                                                                                           楚塞①三湘②接,荆门九派通。

                                                                                           江流天地外,山色有无中。

                                                                                           郡邑浮前浦,波澜动远空。

                                                                                           襄阳好风日,留醉与山翁③。

【注释】①楚塞:楚国的边界。战国时这一带本为楚地。②三湘:漓湘、潇湘、蒸湘的总称,在今湖南境内。③山翁:指晋代山简,竹林七贤山涛之子。曾任征南将军,好饮,每饮必醉。