教师加强自身的学习,努力钻研教育理论,以使自己灵活地解决教学中的实际问题。这时教师所扮演的主要角色是()
A. 教书的角色
B. 育人的角色
C. 管理的角色
D. 研究的角色
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An ocean towing bridle should().
A. have equal legs of sufficient length
B. have a large angle between the legs
C. be formed on a bight of cable through a ring
D. never be made up of chai
Rolls-Royce is world famous for()
A. machine tools
B. household appliances
C. luxury automobiles
D. high-quality knives and hand tool
当APU的引气活门打开时EGT()
A. 升高
B. 降低
C. 不变
D. 不能确定