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问题 单项选择题

一质点t=0时刻位于正最大位移处并沿y方向作谐振动，以此振动质点为波源，则沿x轴正方向传播，波长为λ的横波的波动表达式可写为（）。

A.

B.

C.

D.

答案

参考答案：D

单项选择题 A1型题

为防止131I被结节外甲状腺组织摄取，131I治疗自主功能性甲状腺结节后应继续服用甲状腺素的时间为（）。

A.2周

B.1个月

C.2个月

D.3个月

E.6个月
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单项选择题

Although the bulk of industry resources and energies have focused on developing the fastest (11) or slickest (12) , more and more mindshare is turning to the evolution of the computer interface. Advancements in the areas of input devices, (13) processing and virtual reality could lead to fundamental changes in the way human and computer interact. The technological battlefield of the future will be adding layers between the user and the raw machine to make the (14) as invisible as possible. (15) represents the next evolutionary step for the interface.

A．microprocessor

B．operating systems

C．voice

D．interface
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