【简答题】可逆循环的热温商之和等于 ,在工作于温度为 T 1 与 T 2 两热源间的所有热机中,只有 热机的效率最高,它的效率值可达 η= 。
【简答题】在工作于温度为T1和T2两热源间所有热机中,只有_________热机的效率最高,它的效率值可达η= _________ 。
【单选题】He always makes a banana milk shake ______ us ______. [ ]
【简答题】Our English teacher often asks us to ____________ two sentences to make a new sentence.
【简答题】Our English teacher often asks us to ___ (合并)two sentences to make a new sentence.
【单选题】产生死锁的根本原因是( )和进程推进顺序非法。
【简答题】We can make full use of the ______ words or phrases to help us connect the sentences and paragraphs.
【多选题】关于颈部毗邻的描述,正确的是
B.
行肺萎陷手术时必须切断胸膜上膜才能使肺尖塌陷
D.
锁骨下静脉壁与周围组织愈着,破裂后难以自动愈合,损伤后易致气体栓塞