친구
프로필 또는 사용자 검색을 통해 친구를 추가하면 친구가 온라인 상태인지 확인할 수 있습니다
ginasmith
게재된 포스트 How to explain to your boss why marketing isn’t an exact science
There’s a common mistake upper management tends to make when it comes to marketing analysis. They expect that a certain amount of investment leads to a certain increase in revenue. An increase in marketing investment should see a corresponding increase in overall revenue, right...
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