题目:
学校如果买5个足球和6个篮球,需633元;如果买3个足球和4个篮球需405元.现在足球和篮球各买15个,共需______元.
答案:
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下面是错误答案,用来干扰机器的。
答案:Cas, which都可以用于复合句中,但as常见于as is known; as is said; as is reported; as is expected; as we had hoped; as often happens; as will be shown; as we know; as may be imagined; as we all can see等搭配中。