题目内容
A lot of Japanese students of English have difficult ________ the pronunciation of “b”s and “v”s.
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采用粘接修复技术之前要考虑哪些因素？
Sometimes two or more companies pool their resources for one project or purpose that they would or could not undertake alone.
The only feasible solution was to build an 800-mile pipeline across the Alaskan wilderness to deliver the oil to a warm-water port in the southern part of the state.
It was thought that the pipeline would generate oil revenues pf $5billion year.
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