设备故障率最低的时期是（）
A.初期故障期
B.正常故障期
C.偶发故障期
D.磨损故障期
参考答案：C
All of the students held the view _________ the teacher advised them to do was reasonable.
A．that what
B．what that
C．that that
D．whether what
某烃1mol完全燃烧生成4molCO2，且能与2mol氢气加成，该烃是下列中的
