【单选题】If you ________ yesterday,you ________ with your mother now.
B.
had set off; would be talking
C.
set off; would have talked
D.
had set off; would talk
【简答题】什么是柔性制造系统?它的竞争优势体现在哪些方面?
【判断题】新冠肺炎主要与流感病毒、副流感病毒、腺病毒、呼吸道合胞病毒等病毒性肺炎鉴别。
【单选题】The waiter _____refills on a coffeetable. [ ]
【单选题】Flight 987 will in five minutes.