A co-worker uses a gadget from the Windows Sidebar feature on their computer. You examine your computer and find that the gadget is not on the list of available gadgets. You need to add this gadget to the Windows Sidebar feature on your computer. What should you do?（） 
- A、A
- B、B
- C、C
- D、D
正确答案:A
答案解析:有
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