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【单选题】
下列不计算建筑面积的项目是( )。
A.
阳台
B.
室外爬梯
C.
电梯井
D.
建筑物的门厅
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举一反三
【单选题】The property of ()suggests that pragmatic implicature is produced by being co-operative and by relying on utterance contexts.
A.
non-conventionality
B.
Cancellability
C.
information presented
D.
non-detachability
【单选题】Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?
A.
Pressure-reducing valve
B.
Unloading valve
C.
Counterbalance valve
D.
Pressure-relief valve
【简答题】An yst gathers the following information ($ millions) about three companies operating in the same industry: Although the companies have different levels of sales and assets, they are all experienc...
【单选题】In the Oil Record Book, a comprehensive list of operational items are grouped into operational sectionsEach section is codified by a/an _____.
A.
number
B.
abbreviation
C.
letter
D.
All of the above
【单选题】已知向量 a =(1,1), b =(2,x),若 a + b 与4 b -2 a 平行,则实数x的值为 [     ]
A.
-2
B.
0
C.
1
D.
2
【单选题】已知向量 a =(1,1), b =(2,x),若 a + b 与4 b -2 a 平行,则实数x的值是 [     ]
A.
-2
B.
0
C.
1
D.
2
【单选题】唯心主义认为世界统一于
A.
物质
B.
意识
C.
存在
D.
实践
【单选题】中国的绿茶名品最多,不仅香高味长,品质优异,且造型独特,具有较高的艺术欣赏价值。绿茶由于杀青方法不同分();干燥方法不同分()。
A.
蒸青、烘青;炒青、晒青
B.
蒸青、炒青;烘青、晒青
C.
炒青、晒青;蒸青、烘青
D.
炒青、烘青;蒸青、晒青
【单选题】已知向量 a =(x,1), b =(4,x)且 a 与 b 的夹角为π,则x=(  )
A.
2
B.
-2
C.
±2
D.
0
【简答题】(1)已知| a |=2,| b |=3, a 与 b 的夹角为120°,求(2 a - b )?( a +3 b ). (2)已知向量 a =(1,1), b =(2,x),若 a + b 与4 b -2 a 平行,求实数x的值.
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