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举一反三
【单选题】Entertainment in LondonBuying Books Londoners are great readers. They buy vast numbers of newspapers and magazines and even of books especially paperbacks, which are still comparatively cheap in spite...
A.
It’s to the cast of London.
B.
It’s street of bookstores.
C.
It’s a center for second-hand books.
D.
It’s where worthless books are sold.
【单选题】由于（），往往使得稳性过小而不能保证船舶安全。 ①船舶重心提高； ②受风面积增大； ③双层底高； ④海况条件的影响。
A.
①②④
B.
②③④
C.
①③④
D.
①②③④