题目内容

sterilization by filtration

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These sessions are designed to ________ better working relationships.
A foster
B enact
C revise
D implement

medium filtration

After considering carefully, my plan has gradually come to ________.
A maturity
B sensibility
C justification
D awareness

He can work out ________ plans in case one or another risk appears.
A emergency
B urgency
C contingency
D efficiency