斯滕伯格提出爱情有3种成分（）。

（选修3-4选做题）

沿x轴正方向传播的简谐横波在s时的波形如图所示，此时波传播到处的质点B，质点A恰好位于波谷位置，C、D两个质点的平衡位置分别位于和处。当时，质点A恰好第一次(从计时后算起)处于波峰位置，则下列判断中正确的是

A．该波的波速等于5m/s

B．当时，质点C在平衡位置处且向下运动

C．当时，质点D的位移为―2cm

D．当质点D第一次位于波谷位置时，质点B恰好也位于波谷位置

Gina was _____ in 1999. She is old enough to go to school.[ ]

A. bear

B. bore

C. born

D. bears

An analyst working at an investment firm has a client that rents limousines. The client tells the analyst that as long as he is the client’s analyst, he can have free use of a limousine several times a year. The analyst needs to:（）

A. inform his supervisor in writing of the offer if the analyst intends to accept the offer.

B. explicitly refuse such an offer.

C. do nothing since the offer is not linked to the performance of the client’s portfolio.

血清胆红素小于多少时，可停止光疗

A．7mg/dl

B．8mg/dl

C．9mg/dl

D．10mg/dl

E．11mg/dl

医患纠纷就是医疗纠纷。