【单选题】【消耗次数：1】
某矿物呈板状，黑色，珍珠光泽，一组极完全解理，硬度2．5～3。该矿物可定名（）。
①
辉石
②
角闪石
③
橄榄石
④
黑云母
参考答案：
复制
纠错
相关题目
【简答题】
什么是矿物的硬度？
随机题目
【单选题】
35.No matter how frequently _____ the works of Beethoven always attract a large number of people.
①
performing
②
performed
③
tobeperformed
④
beingperformed
【单选题】
38. In recent years much more emphasis has been put______ developing the students productive skills.
①
onto
②
in
③
over
④
on
【单选题】
39. A survey was carried out on the death rate of those who were infected by SARS, ________were surprising.
①
asresults
②
whichresults
③
theresultsofit
④
theresultsofwhich
【单选题】
34.I heard that you really had a wonderful time at Johns birthday party, _____?
①
didntI
②
didntyou
③
hadntyou
④
willyou
【单选题】
37._____ of water makes Death Valley a desert, but it is by no means devoid.
①
Lacking
②
Beinglack
③
Becauseoflack
④
Lack
【单选题】
33.Modern science and technology has _____ communication between people far apart.
①
madeconvenient
②
madeitconvenient
③
madeitconvenientfor
④
madeitconvenientto
【单选题】
31. The professor said he could talk on _____ interested the audience.
①
anytopic
②
whichtopic
③
whichevertopic
④
thetopichethoughtit
【单选题】
32.Under no circumstance _____ to tell lies to parents.
①
childrenareallowed
②
arechildrenallowed
③
childrenwillallow
④
willchildrenallow
【单选题】
40. Many workers were organized to clear away ______remained of the World Trade Center.
①
those
②
that
③
what
④
where