题型:选择题 —What about taking a taxi to the Friendship Store? —I can not _______ it. Let's take the subway instead. [ ]A. choose B. pay C. regard D. afford 查看答案
题型:单项选择题 由于调心托辊组结构比较复杂,运转中维修困难及维修量大,有的带式输送机设计已取消使用调心托辊组,为阻止胶带跑偏,把槽型托辊组侧辊前倾()。A.3°~5°B.1°~3°C.5°~7°D.7°~9° 查看答案