自动观测项目的日极值从当日各()中挑取;日极值出现二次或以上时,出现时间任挑()个。
参考答案:瞬时值;一
They were_______ busy_______ with each other__________ the time. [ ]
A. too; to talk; to forget
B. too; talking; to forget
C. so; to talk; that they forgot
D. so; talking; that they forgot
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