【判断题】培养料中加入一定量的石灰,主要是增加钙素
【单选题】Years ago, many of the machines were operated ______ but now they are operated by computers.
【单选题】If there were no automatic washing machines, people would have to wash their clothes ______ hand or ______ hand-operated machines.
【单选题】It was in this factory ______ 'West Lake' sewing machines were made.
【单选题】All the machines ______ by the end of the following week.
D.
will have been repaired
【多选题】Which of the following items will appear on the E-ticket itinerary?
D.
free baggage allowance
【单选题】在 Word 中,为了保证字符格式的显示效果和打印效果一致 . 应设定的视图方式是( )。
【单选题】The earliest bicycles were called 'running machines' because ______.
A.
people have to run on feet when using the machines
B.
they were faster than running men
C.
the riders could run on the bicycles
D.
the bicycles could run fast automatically
【单选题】运行中的隔离开关刀闸口的最高允许温度为()。