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  3. It carries white blood cells and disease-fighting chemicals called antibodies to places where foreign invaders such as bacteria

It carries white blood cells and disease-fighting chemicals called antibodies to places where foreign invaders such as bacteria

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问题 It carries white blood cells and disease-fighting chemicals called antibodies to places where foreign invaders such as bacteria and viruses are causing infections this statement______.
In para. 4 the author uses an example to show______.
选项 A、what a low concentration of oxygen-carrying red cells will do
B、the serious consequence of imbalance of the blood
C、how a low concentration of white cells reduce the body’s ability to fight infection
D、how the red cells to carry oxygen to every part of body
答案B
解析 细节题。举例一般都是为了说明前面某种情况，在该句前面"so can an imbalance...parts"是一表明前面情况也适合于后者的倒装句，在上段末句提到"因突发事故或疾病而大量失血会导致严重后果"，因此"so can．．．bloods parts"意为"血液各成分之间失调也会引发严重后果"，随后的举例也是为了说明这一点，因此答案为B。
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