我国《对外贸易法》规定了国家管理对外贸易的基本原则有( )。
A.实行全国统一与部分地区特殊对待的对外贸易制度原则
B.平等互利原则
C.非歧视原则
D.对等原则
参考答案:B,C,D
下列属于医院感染的是()
A.新生儿出生后48小时内出现的水痘
B.非生物因子刺激产生的炎症表现
C.创伤产生的炎症表现
D.原有的慢性感染在医院内急性发作
E.自入院时起超过平均潜伏期后发生的感染
Before work is commenced(),the officer responsible should inform the duty en-gineer to ensure that steps are taken to reduce as far as practicable the emission of steam, harmful gases and fumes.
A.near the ship’s whistle
B.on the funnel
C.in the vicinity of radio aerials
D.near the radar scanner