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【简答题】
金属晶体的几何点阵模型中,一个立方体称为一个晶胞,晶胞中所有原子占据的体积与立方体的体积之比,称为致密度。请分别计算:体心立方和面心立方结构的致密度。
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【简答题】bathroom['bɑːθruːm, -rʊm]
【单选题】______ is surprising to us is that Tom, for ______ English was once boring, can speak English fluently as though he were a native speaker.
A.
What; whom
B.
What; whose
C.
It; whose
D.
As; whom
【简答题】（ru1r?杨浦区）找出下面各组数排列的规律，并根据规律在横线或方框里填如合适的数． （1）g，1r，16，ru，______，rg，3r． （r）大图．
【单选题】______ is surprising to us is that Tom, for ______ English was once boring, can speak English fluently as though he were a native speaker.
A.
What; whose
B.
What; whom
C.
It; whose
D.
As; whom
【简答题】bathroom['bɑːθruːm, -rʊm]
【单选题】In English if a word begins with a [l] or [r] then the next sound must be a ______.
A.
fricative
B.
nasal sound
C.
semi-vowel
D.
vowel
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