4. According to the passage, using a hot
glass tube rather than a wheel to pull
fibers from molten glass made the fibers
(A) quicker to cool
(B) harder to bend
(C) shorter and more easily broken
(D) longer and more durable
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統計: A(0), B(2), C(3), D(11), E(0) #803553
統計: A(0), B(2), C(3), D(11), E(0) #803553