美沙酮、多柔比星、水杨酸、氢氯噻嗪可产生的药物性肺损伤是()
A.急性肺水肿
B.哮喘
C.肺动脉高压
D.肺血管炎
E.肺嗜酸性粒细胞增生症
参考答案:A
We began to work in the fields. ____, it started to rain, so we went home.
A.But
B.However
C.While
D.Yet
简述采用直接头脑风暴法组织专家会议时应遵守的原则。