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【简答题】
下表中各元素的数据代表该元素占原子总量的百分比，请据表回答问题： (1)组成人体的化学元素在元素周期表上，它普遍存在于非生物界，生物体内不包含特殊的“生命元素”，这个事实说明_______________。 (2)生物从非生物环境中获得的那些元素与环境中的这些元素的比例相差甚远。如岩石圈中，氢、碳、氮加在一起原子数不到1%，而在生物体中原子数的74%左右。这个事实说明_________________。 (3)人体中的钙在骨和牙齿中以________的形式存在，成年人缺少时会患________症。钙在血液中主要以________形式存在，如果含量太低会出现_______现象。 (4)从此表看，人体成分中没有铁的含量，是否人体不含铁?________。为什么?_________。
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A.
/
B.
the
C.
a
D.
an
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A.
affair
B.
situation
C.
condition
D.
matter
【单选题】I have never been to London, but that is the city______.
A.
where I like to visit most
B.
I'd most like to visit
C.
which I like to visit mostly
D.
where I'd like most to visit
【单选题】London,______ last year, is a nice old city.
A.
that I visited
B.
which I visited
C.
I visited
D.
where I visited
【单选题】I have never been to London, but that is the city _______________.
A.
Where I like to visit most
B.
I ’ d most like to visit
C.
Which I like to visit most
D.
Where I ’ d like most to visit
【单选题】I have never been to London, but that is the city ______.[1997]
A.
where I like to visit most
B.
I'd most like to visit
C.
which I like to visit mostly
D.
where I'd like most to visit
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