下列哪种药引起跌倒的危险性最大
A.镇静催眠药
B.镇痛药
C.抗抑郁药
D.利尿剂
E.降压药
参考答案:A
If he _____ , I _____ swimming alone.
[ ]
A. doesn't come, will go
B. won't come, will go
C. will come, won't go
D. is coming, don't go
哥伦比亚河流域及五大湖区的水电基地将向北美洲西部和东部负荷中心送电。