The train_____at the present speed until it reaches Chicago at eleven o’clock tonight.

A．has gone

B．will be going

C．went

D．goes

尿中呈无色、六边形、边缘清晰、折光性强的薄片状结晶可能是()

A．胆固醇结晶

B．胱氨酸结晶

C．亮氨酸结晶，

D．酪氨酸结晶

E．磷酸铵镁结晶