单项选择题

铁陨石由91%的金属铁和8%的镍组成,密度约()g/cm3,而仿品赤铁矿5.5-6.5磁铁矿4.9-5.2黄铁矿4.9-5.2,所以鉴定铁陨石的首要因素就是看密度。

A、6.5-7
B、7-7.5
C、7.5-8
D、8-8.5

你可能感兴趣的试题

单项选择题

Some forms of human communication from a primitive tribe to a global village (mentioned in the course book) include _________.
computer network, TV stations, drumbeats, chopsticks
B. smoke signals, pigeons, peacocks, mobile phones, emails …
C. gestures, TV, email, fire, horns, flags, animals …
D. shouting to each other, printing, telegraph, radio, internet …

多项选择题

在中国文学史上，有“晚明四公子”之称，下列的四位的文人作家，那几个名在其列？（）

A.方以智
B.侯方域
C.冒襄
D.陈贞慧