路中心的双黄实线作用是分隔对向交通流,在保证安全的前提下,可越线超车或转弯。
参考答案:错
Ricky is always the last one________dinner, for he gets home late every evening. [ ]
A. had
B. having
C. having had
D. to have
氨基甙类最常见的不良反应是:()
A.肾毒性
B.耳毒性
C.变态反应
D.头痛头晕