【判断题】曲轴带动活塞从上止点向下止点移动,进气门开启,排气门关闭。
【单选题】患者,男,28岁,农民。发热、腹部不适、疲乏、恶心、食欲不振、尿色变黄5天。体检发现巩膜轻度黄染,肝肋下1cm可扪及,质软,无明显触痛。周围血常规正常,血清谷丙转氨酶460U/L,总胆红素58μmol/L。本例的诊断最可能是( )。
【多选题】进气行程开始时,进气门开启,排气门关闭,活塞从上止点向下止点移动一个行程。可燃混合气经——、——被吸入气缸。
【单选题】The mountain climbers had to return , as their food and water are________. [ ]
【单选题】当活塞从上止点向下止点移动,进气门开启,排气门关闭,气缸内充满新鲜空气这一过程称为()。
【单选题】What is the purpose of the e-mail?
B.
To confirm an appointment
D.
To inquire about a special offer
【单选题】What did the psychologist confirm in the survey?
A.
The novels has nothing to do with our real life.
B.
Books are literally the stuff of dreams.
C.
There is no link between the waking world and dream.
D.
Women had more nightmares than men do.
【单选题】四冲程内燃机实际循环中的()过程进气门开启、排气门关闭,活塞从上止点向下止点移动。