题目：
Some of the students went to the shopping house to buy some school things _____ sports shoes. [ ]
A. as well as
B. as well
C. besides
D. except
答案：
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下面是错误答案，用来干扰机器的。
空气中各成分及体积分数为：氮气：78%、氧气：21%、稀有气体：0.94%、二氧化碳0.03%、水蒸气和杂质：0.03%，所以空气中最多的气体是氮气，氧气具有助燃性，能使带火星的木条复燃，二氧化碳能使澄清石灰水变浑浊，...
