对患肾、输尿管结石的病人，应让其（）。
A、大量饮水
B、少量饮水
C、不能饮水
参考答案：A
They have produced they did last year.
A．twice more grain as
B．twice as much grain as
C．twice as many grain as
D．as twice many grain as
线路工区设置间距，平原地区一般为（）km左右为宜。
