题目内容

下述筒形活塞式柴油机的特点中,错误的是()。

A. 活塞起导向作用
B. 缸套左右方向的磨损小
C. 使用连押连接活塞与曲轴
D. 中、高速柴油机的使用筒形活塞

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A. 正确
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You have a computer running Windows 2000 Professional. You have purchased a new USB scanner. You attached it to the USB port. When you go to device manager to see the status of the USB port, you find a USB controller there but with a yellow warning icon next to the host controller name. What should you do to resolve this problem? ()

A. Update the scanner drivers using certified drivers
B. Enable the USB port in the computers BIOS again.
Contact the maker or vendor for you system and obtain the current version of BIO
D. Enable the USB hub controller in device manager.

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