单项选择题

According to the passage, what was badly needed to improve industrial industry at the turn of the 20th century

A．Great breakthroughs.
B．Unlimited purchasing power.
C．Science and competition.
D．International competition
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单项选择题
Taylor is most famous for ______.
A．his application of scientific methods to work
B．his book 7he Principles of Scientific Management
C．his various innovations in steel processing
D．the spreading of his scientific management method
单项选择题
Which of the following is NOT included in the present space tourism
A．Visits to museums.
B．Visits to space camps.
C．Visits to rocket-launch recovery sites.
D．Low-gravity aircraft trips.
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