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【简答题】
JIT 采购的英文全称为 ,核心内容是 、 。
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皮皮学刷刷变学霸
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【简答题】mass air flow ( MAF ) sensor
【简答题】连接螺纹常采用何种螺纹？传动螺旋常采用何种螺纹？为什么？
【单选题】刺绣俗称“绣花”，在中国至少有三千年的历史，目前传世最早的刺绣为湖南长沙战国楚墓中出土的绣品。
A.
Embroidery, also known as xiuhua in Chinese, has a history of at least three thousand years, the earliest embroidery that remains today is unearthed from the Chu tomb of the Warring States Period in Changsha, Hunan Province.
B.
Embroidery, also known as xiuhua in Chinese, has a history of at least three thousand years. The earliest embroidery that remains today is unearthed from the Chu tomb of the Warring States Period in Changsha, Hunan Province.
C.
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D.
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【简答题】何为螺旋传动?