对于慢性支气管炎的发病因素,下列不正确的是()
A.副交感神经反应降低
B.呼吸道局部防御功能和免疫功能低下
C.吸烟
D.气候寒冷
E.遗传因素
参考答案:A
—Who should be responsible for the accident?
—The boss, not the workers. They just carry the orders _______.
A.as told
B.as are told
C.as telling
D.as they told
整体式衬砌采用料石砌筑时,料石的强度要求至少()。
A.大于30Mpa
B.大于25Mpa
C.大于5Mpa
D.小于30Mpa