神经-肌肉接头后膜上水解神经递质的酶是()
A.胆碱酯酶
B.磷酸酯酶
C.羧肽酶
D.脱氨基酶
E.碳酸苷酶
参考答案:A
All the preparations for the work_______, we’re ready to start.
A.are completed
B.have been completed
C.completed
D.had been completed
二进制同步协议