【单选题】During working of an air compressor, _____ should be drained .
【单选题】Jane’s brother’s _______ an American company. [ ]
【单选题】为6个月以后婴儿创设运动空间,可以使( )得到充分的发展.
【单选题】From the research conducted by the communication provider Inter-Tel, we learn that______.
A.
attitudes toward IT technology have changed
B.
more employees work to full capacity at home
C.
more businesses have adopted remote working solution
D.
employees show a growing interest in small businesses
【单选题】脚部单一击打 训练是滚龙连厢 , ()互动性较强的击打训练组合。
【单选题】苯环是指()
C.
1900~1650cm -1 ;1300~1000cm -1
D.
3750~3000cm -1 ;1300~1000cm -1
E.
3300~3000cm -1 ;1675~1500cm -1 ;1000~650cm -1