影响苹果酸―乳酸发酵的因素。
旅客在发站办理改签时，改签后的车次票价高于原票价时，核收票价差额；改签后的票价低于原票价时，（） ["退还手续费","差额票价不予退还","退还票价差额"]
菊池宽任哪个杂志的主编？（） ["新思潮","文艺春秋","新小说","中央公论"]
PTN是指（） ["分组传送网","同步传送网","异步传送网","波分传送网"]
In an Ethernet network, under what two scenarios can devices transmit?（） [" when they receive a special token"," when there is a carrier"," when they detect no other devices are sending"," when the medium is idle"," when the server grants acce"]
比较文学的主要分支
