After the Wenchuan earthquake, a certain frame structure should take earthquake-resistant improvement  measure. If a number of seismic walls connected through the upper and lower sections are directly added  to the original frame structure, is the structure safe and reliable?  (A) The central plains frame of the lower floor may be unsafe (B) The upper floor of the Plains frame may be unsafe (C) The entire structure is safer (D) None of the above is correct

Applications and Investigations in Earth Science (9th Edition)
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ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
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9. After the Wenchuan earthquake, a certain frame structure should take earthquake-resistant improvement 
measure. If a number of seismic walls connected through the upper and lower sections are directly added 
to the original frame structure, is the structure safe and reliable? 


(A) The central plains frame of the lower floor may be unsafe
(B) The upper floor of the Plains frame may be unsafe
(C) The entire structure is safer
(D) None of the above is correct

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