皮下埋植剂植入（）小时后即可达到避孕的有效血液浓度。
A.6
B.12
C.24
D.48
参考答案：C
Every year, a great many visitors come to visit the temple ______ the 12th century, ______ has brought a large income.
A．dating from; which
B．dated from; which
C．which dates from; that
D．which dated from; which
某进口公司承揽一笔来料加工业务，委托某个体企业加工，该个体企业可以以自己的名义向海关办理报关手续。 ( )
