一质点带电量 q = 1.6 × 10 -18 C ,以速度 v = 1.0 × 10 5 m/s 在半径为 R = 1.0 × 10 -8 m 的圆周上作匀速圆周运动。则该带电质点在轨道中心产生的 磁感应强度 B = T。
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举一反三
【单选题】The CPA firm auditing XY Recording Service found that retained earning were understated and liabilities were overstated. Which of the following errors could have been the cause?
A.
Making the adjustment entry for depreciation expenses twice;
B.
Failure to record interest accrued on a note payable;
C.
Failure to make the adjusting entry to record revenue which had been earned but ot yet billed to clients;
D.
Failure to record the earned portion of fees received in advance.
【简答题】The following is a portion of an adverse audit report issued for a public company. (Note: A separate report was issued on the effectiveness of internal control over financial reporting.) Independent A...
【单选题】You are the desktop administrator for your company. You need to upgrade a Windows 98 computer to Windows XP Professional. Windows 98 is installed in a folder named C:/Win98. You need to ensure that t...
A.
Rename the C:/Win98 folder to C:/Windows.
B.
Modify the installation settings in the text-based portion of Setup so that Windows XP Professional is installed in the C:/Win98 folder.
C.
Restart the computer by using Windows 98. Then insert the Windows XP Professional CD-ROM into the computer and run Setup from the CD-ROM.
D.
Use the Windows XP Professional CD-ROM to create a set of Setup floppy disks. Restart the computer by using the first floppy disk in the set to launch Setup.