問題詳情

請依下文回答第 39 題至第 41 題:Leonardo da Vinci spent many unfruitful years, 39 his first stay in Milan and his second period in Florence,experimenting with a flying machine. The attempt to support and move the human body in the air 40 because, inthe absence of an internal combustion engine, Leonardo could not create mechanisms of propulsion capable ofproviding the necessary upward lift. Nevertheless, based on this understanding of air currents pressure, and resistance,he 41 designs for machines that anticipated the modern glider, parachute, and helicopter. Related to these studieswere notes concerning the cosmos, later developed by Galileo.
39
(A)up
(B)during
(C)for
(D)due to

參考答案

答案:B
難度:適中0.601626
統計:A(19),B(148),C(44),D(21),E(0)

內容推薦