如图所示是做直线运动的甲、乙物体的位移—时间（x-t）图象，由

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问题选择题

如图所示是做直线运动的甲、乙物体的位移—时间（x-t）图象，由图象可知（）

A．乙起动的时间比甲早t₁秒

B．当t=t₂时两物体速度相同

C．当t=t₂时两物体相距最远

D．当t=t₃时两物体相距x₁米

答案

答案：D

选择题

Nowhere else along the coast _______ so far from land.

A．is there such shallow water

B．is there so shallow water

C．there such shallow water is

D．there is such shallow water

单项选择题

A young adult had a significant reaction to the Mantoux test. What conclusion would the nurse make from the findings

A．The client has active tuberculosis.

B．The client had active tuberculosis.

C．The client has been exposed to tuberculosis.

D．The client is immunocompromised.