皮皮学，免费搜题
登录
搜题
【单选题】
若柴油着火延迟期过长,会引起柴油机( )。A.
爆燃爆震
B.
工作粗暴
C.
飞车
D.
损坏
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】You can ________ in your dictionary. [ ]
A.
look up them
B.
look up they
C.
look them up
D.
look they up
【单选题】If you don't know how to spell new word, in a dictionary. [ ]
A.
look them up
B.
look they up
C.
look up them
D.
look up they