单项选择题

According to the passage, what was badly needed to improve industrial efficiency

A．Great breakthroughs.
B．Unlimited purchasing power.
C．Science and competition.
D．International competition.
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单项选择题
After the bombing of Guernica, the Germans ______.
A．managed to launch the Spanish Civil War
B．frightened the whole world into silence
C．went on to wipe out Dresden and Hiroshima
D．did not admit their crime
单项选择题
When Taylor died in 1915, ______.
A．his steel mill was sold
B．his book was published
C．the slave-driving method had already been stopped
D．a lot of followers continued to improve his theory
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