下面防腐剂有剧毒的是（）。
A、氟化钠
B、氟砷铬合剂
C、硼铬合剂
D、铜铬合剂
参考答案：B
实际执行的强制戒毒期限连续计算( )。
A．不超过3个月B．不超过6个月C．不超过1年D．不超过2年
We cannot proceed any further without ( )your thoughts with respect to the manner of payment.
A. receiving B. receiveC. received D. being received
