TATA盒结构是典型的
A．真核启动子B．原核启动子C．反式作用因子D．转录因子
参考答案：A
保税货物和减免税货物均属于海关监管货物，但海关对前者实行时效管理，对后者实行核销管理。( )
---Did you also walk to Zhenguo Temple, Gaoyou from Yangzhou ?
---Yes, it was a great trip ______ we didn’t enjoy it ______ the beginning because it rained .
A．and; in
B．or; at
C．so; at
D．but; at
