It has been necessary to refer repeatedly to the .effects of the two world wars in promoting all kind of innovation. It should be (1) also that technological innovations have (2) the character of war itself by the (3) of new mechanical and chemical device. One weapon developed during World War Ⅱ (4) a special mention. The (5) of rocket propulsions was well known earlier, and its possibilities as a (6) of achieving speeds sufficient to escape from the Earth’s gravitational pull had been (7) by the Russian and the American scientists. The latter built experimental liquid-fuelled rockets in 1926. (8) , a group of German and Romanian pioneers was working (9) the same lines and in the 1930s, it was this team that developed a rocket (10) of delivering a warhead hundreds of miles away. Reaching a height of over 100 miles, the V-2 rocket (11) the beginning of the Space Age, and members of its design team w
A. across
B. at
C. along
D. with
| It has been necessary to refer
repeatedly to the .effects of the two world wars in promoting all kind of
innovation. It should be (1) also that technological
innovations have (2) the character of war itself by the
(3) of new mechanical and chemical device. One weapon developed
during World War Ⅱ (4) a special mention. The (5)
of rocket propulsions was well known earlier, and its possibilities as
a (6) of achieving speeds sufficient to escape from the
Earth’s gravitational pull had been (7) by the Russian and
the American scientists. The latter built experimental liquid-fuelled rockets in
1926. (8) , a group of German and Romanian pioneers was
working (9) the same lines and in the 1930s, it was this
team that developed a rocket (10) of delivering a warhead
hundreds of miles aw A. notified B. observed C. commented D. detected 我来回答: 提交
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