感冒退热颗粒的功能是（）。
A、清热解毒
B、清热凉血
C、气血两清
D、清虚热
参考答案：A
Shelly ______ California for Texas in 1996 and ______ there ever since. [ ]
A. left; worked
B. left; has worked
C. has left; had worked
D. has left; worked
（）起重机可带重行走，作业范围大，非生产时间少，生产效率高。
A．轨道式塔式
B．爬升式塔式
C．附着式塔式
D．履带式塔式
