以下那种是TD-LTE标准中定义的上下行转化点周期（）
A.5ms
B.10ms
C.15ms
D.20ms
参考答案：A, B
Many people think it necessary for people who are out of work ______so that they can acquire one
or more basic skills for survival in modern society. [ ]
A. be reeducated
B. being reeducated
C. to be reeducated
D. reeducated
左金丸中黄连与吴茱萸用量的配伍比例是（）
A.5：1
B.2：1
C.6：1
D.10：1
E.7：1
______so that they can acquire one 