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【单选题】
燃气涡轮发动机的压气机效率为：A.
压气机实际功与压气机理想绝热缩功之比
B.
压气机理想绝热缩功与压气机实际功之比
C.
轮缘功与压气机实际功之比
D.
轮缘功与压气机理想绝热缩功之比
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皮皮学刷刷变学霸
举一反三
【单选题】Weather forecasters make some use of computer ____ to identify weather pattern.
A.
productions
B.
projections
C.
protections
D.
promotions
【判断题】The relative frequency approach is useful in interpreting probability statements such as those heard from weather forecasters or scientists.
A.
正确
B.
错误
【多选题】《危险化学品安全管理条例》中所称的危险品，包括( )。
A.
爆炸品、压缩气体和液化气体
B.
易燃液体、易燃固体
C.
自燃物品和遇湿易燃物品
D.
氧化剂和有机过氧化物
E.
有毒物品和腐蚀品
【单选题】Hurricane Belle was noteworthy because
A.
it didn't follow the path predicted by forecasters.
B.
it didn't move at the speed predicted by forecasters.
C.
it killed more people than any other hurricanes.
D.
it caused more damage than any other hurricanes.
【多选题】如下说法正确的是( )。
A.
城市市区的土地属于国家所有
B.
农村的土地，除由法律规定属于国家所有的以外，属于农民集体所有
C.
农村的宅基地和自留地、自留山，属于农民集体所有
D.
城市郊区的土地，均不属于农民集体所有
【单选题】A few days without rain have allowed flood waters to begin to _____ , but weather forecasters predict more monsoon rains in the days to come.
A.
recede
B.
deem
C.
rise
D.
intervene
【单选题】How do weather forecasters identify hurricanes?
A.
By name.
B.
By number.
C.
By location.
D.
By month.
【单选题】Temperatures will soar over the weekend, say the weather forecasters. 天气预报员说,气温会在周末骤升。
A.
increased rapidly
B.
rose to a great height
C.
flew at a great height
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