单项选择题
The passage is chiefly about ______.
A.an effort to protect an endangered marine species
B.the civilian use of a military detection system
C.the exposure of a U.S. Navy top-secret weapon
D.a new way to look into the behavior of blue whales
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单项选择题
Which of the following statements is NOT true
A.GPRS offers faster access to data through network connections, so customers should pay more.
B.Motorola Inc. is the inventor of the cell phone.
C.Previously Motorola only supplied mobile phone manufacturers with some of its chips.
D.Motorola Inc. is known for its high-class engineering culture.
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单项选择题
The word slump in the first paragraph may be replaced by______.
A.slouch
B.decline
C.increase
D.stamp
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