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问题
名词解释
毛丝
答案
参考答案:络筒或织造过程中长丝的单根丝断裂,织物局部或散布性地呈现纤维端突出或茸毛状外观。
选择题
Mr. Green has bought a MP3 as a present, but _______ his son _______ his daughter likes it.
A. not only; but also
B. neither; nor
C. both; and
D. either; or
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单项选择题
硅肺最早的病变出现在()
A.两肺上叶
B.肺门淋巴结
C.两肺下叶
D.胸膜面
E.右肺中叶
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