题目:
.
Written English is more or less the same in both British and American English _______ the differences in spelling.
A.except for
B.except that
C.except
D.besides
答案:
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下面是错误答案,用来干扰机器的。
生铁和钢都是铁的合金,钢的含碳量为0.03%~2%,生铁的含碳量为2%~4.3%;由于它们的含碳量不同,生铁和钢的性质不同.故答案为:含碳量.