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【单选题】
化学与生产生活密切相关。下列说法正确的是 ( )A.
阻燃剂 Al(OH) 3 受热分解时放出能量
B.
蚕丝、涤纶、棉花的主要成分均为蛋白质
C.
油脂在长期贮存过程中与微生物、酶和空气中的氧气作用会发生酸败
D.
硅太阳能电池与铜锌原电池工作化学能转变为电能
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【单选题】17 Increasing resources on the critical path activities may not always shorten the length of the project because:
A.
Certain activities are time-dependent rather than resource-dependent (i.e., using three ovens rather than one to bake a cake).
B.
Safety, OSHA and EPA may have placed restrictions on the number of people used on certain activities or in the physical location of the project.
C.
The skill level of the added resources might not be appropriate for the activities to be performed.
D.
Adding more resources may create additional work and produce inefficiencies (i.e., additional people may need training and supervision.)
E.
All of the above
【单选题】Increasing resources on the critical path activities may not always shorten the length of the project because:
A.
Certain activities are time-dependent rather than resource-dependent (i.e., using three ovens rather than one to bake a cake).
B.
Safety, OSHA and EPA may have placed restrictions on the number of people used on certain activities or in the physical location of the project.
C.
The skill level of the added resources might not be appropriate for the activities to be performed.
D.
Adding more resources may create additional work and produce inefficiencies (i.e., additional people may need training and supervision.)
E.
All of the above.
【单选题】飞机的登机门通常分为主登机门和服务门
A.
主登机门在机身的左侧，服务门在机身的右侧
B.
主登机门在机身的右侧，服务门在机身的左侧
C.
在紧急情况下主登机门可以当应急出口，服务门不行
D.
在紧急情况下服务门可以当应急出口，主登机门不行
【单选题】Britain has always been fortunate in having plentiful energy resources. At the end of the eighteenth century these were principally coal and, in places water power from swift-flowing streams and river...
A.
rich energy resources
B.
water power
C.
the declining rural economy
D.
cheap labor
【单选题】135 Increasing resources on the critical path activities may not always shorten the length of the project because:
A.
Certain activities are time-dependent rather than resource-dependent (i.e., using three ovens rather than one to bake a cake).
B.
Safety, OSHA and EPA may have placed restrictions on the number of people used on certain activities or in the physical location of the project.
C.
The skill level of the added resources might not be appropriate for the activities to be performed.
D.
Adding more resources may create additional work and produce inefficiencies (i.e., additional people may need training and supervision.)
E.
All of the above
【单选题】● Increasing resources on the critical path activities may not always shorten the length of the project because: A Certain activities are time-dependent rather than resource-dependent (i.e., using thr...
B.
Safety, OSHA and EPA may have placed restrictions on the number of people used on certain activities or in the physical location of the project.
C.
The skill level of the added resources might not be appropriate for the activities to be performed.
D.
Adding more resources may create additional work and produce inefficiencies (i.e., additional people may need training and supervision.)
E.
All of the above.
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