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精彩回答
Shopping habits in the United Stateshave changed greatly in the last quarter of the 20th century.
1年前
小肠适于吸收的特点:①面积大:______、内表面有______和______增大了面积; ②壁薄(3种)______壁、______壁、______壁只有一层______细胞构成.
1年前
What ________ things can you see in the picture? I can’t see anything .
1年前
Which of the three ways shall i take to the village?
1年前
1年前