If there is water in fuel oil, the engine speed will （)
A. decrease
B. increase
C. decreasing
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副井口.主井口及主要通风机房（)m范围内，严禁烟火，不得在井口存放易燃材料。
A. 20
B. 30
C. 40
D. 50
4月龄猪高热稽留，四肢内侧皮肤有出血点。剖检可见脾脏边缘梗死，肾脏有出血点，扁桃体匀浆液接种PK-15细胞，可分离到病毒。引起该病的病原可能是
A. 猪细小病毒
B. 猪圆环病毒
C. 猪瘟病毒
D. 伪狂犬病毒
E. 猪繁殖与呼吸综合征病毒
You are on a cargo vessel carrying portable tanks of dangerous cargoes in bulk.Which statement is TRUE （)_.
A. If the tanks are pumped out while remaining on board，each hose connection must have a minimum of three bolts
B. If the tanks are off loaded，no more than two tanks may be lifted together in a hoist
C. When transferring sulfuric acid，you must display a red flag by day whether at anchor or moored
D. All electrical equipment within 10 feet horizontally must be explosion proof or intrinsically safe
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