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问题
填空题
一个完整的尺寸应包括尺寸界限、尺寸线、（）和箭头等四项要素。
答案
参考答案：尺寸数字
选择题
—Does your sister often talk to your parents?
—Yes,
.
A. she does
B. she don't do
C. she isn't do
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名词解释
干硬性混凝土
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