“见著知微，见微知著”是化学思维方法。
If something is _______, it is known about by only a few people.
鲁尔区为吸引新兴企业落户，采取的措施有 （ ）
Mistake…for; find out; prepare …for; be in hospital ; polite ; knock on the door; carry out ; keep…in order; separate into; direct
