题目内容

预防维修以()为基础,以设备状态监测为手段。

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我国现存的第一部外科专著是《刘涓子鬼遗方》。

A. 正确
B. 错误

关于兴奋通过突触传递特征的叙述,错误的是()

A. 突触传递只能从突触前神经元传向突触后神经元
B. 突触传递需要的时间与兴奋在神经纤维传导差不多
C. 在反射活动中,传入神经上的冲动频率往往与传出神经发出的冲动频率一致
D. 在中枢神经系统内,只有兴奋可以发生总和,而抑制不会发生总和
E. 在突触传递过程中,易受内环境变化和药物的影响

计算题:某选矿厂处理量为3000吨/日,原矿铜品位为1.5%,获得铜精矿重量为180吨,铜品位为20%,求富矿比及铜回收率。

You install a new USB scanner on a Windows 2000 Professional computer. Two weeks later, the user of the computer informs you that when he scans images with the scanner, the colors do not display correctly. When he prints the scanned images, the colors print correctly. You need to ensure that the scanned images display the correct colors. What should you do? ()

A. In scanners and cameras in control panel, remove the color management profile.
B. In the display properties in control panel, set the Windows color scheme to Windows standard.
C. In the advanced properties of the display properties in control panel, remove all color management profiles.
D. In the display properties in control panel, increase the colors setting.

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