49 Which of the following statements regarding the new elevators is true?
(A) They are now available for high-rise buildings in the U. S.
(B) They require global collaborations to develop and construct.
(C) They can be used as the major means of getting people out of a building on fire.
(D) They can be sensitive to changing smoke and heat conditions in a fire emergency.

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統計： A(21), B(96), C(121), D(182), E(0) #948551

詳解 (共 2 筆)

#2558150
(A)新電梯主要用於火災救援(B)新電梯...
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#2351093

 NIST is investigating software and sensing systems that can adapt to changing smoke and heat conditions so that the elevators can maintain safe and reliable operation during fire emergencies

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