承诺迟延
参考答案:
又称迟到的承诺,是指受要约人未在承诺期限内发出的承诺。
Drunk driving used to occur _______, but now it is under control.
A.frequently
B.generally
C.practically
D.gradually
推荐气雾吸人给药,用药后支气管扩张、立即平喘的是()。
A.沙丁胺醇
B.克仑特罗
C.特布他林
D.福莫特罗
E.沙美特罗