[单项选择]

The West has begun to take more notice of the East. The fifth volume of an enormous work re- assessing the Chinese contribution to science and technology is to be published next year. The first volume, which was published twenty years ago, set the tone for the whole work. In it, evidence was given to show that many inventions which, until then, Western historians had claimed for Europe, were made first in China. The attempt to rewrite the intellectual history of the world was not received without protest by some famous historians. However, the evidence that has been presented so far in the first four volumes has persuaded many historians who were skeptical at first. China’s invention of paper, printing, the magnetic compass and gunpowder has never been disputed, but this new history has added advanced bridge design, mechanical clocks, paddle boats and many other inventions to the list.
In the four volumes published so far no attempt has been made to explain
A. Gunpowder.
B. Needles.
C. Paddle boats.
D. Bridge design.

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