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问题 选择题

How happy we are ______ each other here away from home!          [ ]

A. seeing    

B. to see    

C. seen    

D. meeting

答案

答案：B

单项选择题

The nurse is providing home care to a client with failing vision due to macular degeneration. The nurse is concerned about the client’s safety. Which of the following activities would help to lessen the client’s risk of falling

A. Arranging pieces of furniture close together so the client can use them for guidance and support.
B. Encouraging the client to wear a medical identification bracelet that describes the client’s visual deficit.
C. Installing a flashing light to indicate when the phone or doorbell is ringing.
D. Installing handrails in hallways, in bathrooms, and on steps.
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不定项选择

如图所示，在y轴上关于O点对称的A、B两点有等量同种点电荷＋Q，在x轴上C点有点电荷－Q ，且CO＝OD，下列判断正确的是

[ ]

A．D点电场强度为零

B．O点电场强度为零

C．若将点电荷＋q从O移向C，电势能增大

D．若将点电荷－q从O移向C，电势能减小

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