d라이브러리
"number"(으)로 총 142건 검색되었습니다.
- Genes In Action 활동하는 유전자과학동아 l1992년 03호
- " In 1909, Danish biologist Johannsen named the factors "genes," a Greek word meaning "to give birth to."Since the number of chromosomes peculiar to each species is far less than the inheritabl ...
- 이빨이 말해주는 것과학동아 l1992년 02호
- can give one an idea on such things as birth rates. It will also help in estimating the number of predators versus the number of prey.All this is not bad for information from an old, roc ...
- (1) 21세기는 무선통신 천국과학동아 l1992년 02호
- 으로의 발전이 예견된다. 아울러 일반전화도 ISDN으로 진화되면서 개인통신번호(Personal Number)가 도입되면, 유·무선이 일원화 된다. 이로써 움직일 때는 포켓형 전화기를 사용하고 사무실에서는 개인통신번호를 갖는 스마트카드(IC칩을 기억소자로 하는 ID카드)를 이용해 전화를 걸거나 받는 것이 ... ...
- 왜 소행성들을 관찰하는가?과학동아 l1992년 01호
- before they have passed out of view. One close asteroid(or "Earth-grazer", as they are sometimes called) is asteroid number 4769. Very rapid work, including studies of previous passages, showed ...
- 과학평론과학동아 l1991년 12호
- are other differences. In all living mammals, the lower jaw consists of a single bone, Ine reptiles it is made up of a number of bones. The therapsid's lower jaw is made up of seven bones.Howev ...
- 여성 천문학자들과학동아 l1991년 11호
- in 1902. In her meticulous determinations of stellar magnitudes, she discovered 2,400 variable stars, doubling the number known at the time.Her great moment came in 1912, when she was working a ...
- 대규모 탐색 작업과학동아 l1991년 11호
- detected, but then the searches have been small ones, carried on for short periods of time and included only a limited number of stars. What we need is something more than that-searches that wi ...
- 천랑성의 색깔과학동아 l1991년 10호
- After a while, the dim star moves on and the brightness returns. This is an "eclipsing variable" and there are a number of such stars.There are also stars that grow dimmer and brighter that do ...
- 토성의 테가 사라지고 있다과학동아 l1991년 08호
- they move outward as the rings move inward toward Saturn. That would tend to settle matters.Saturn also has a large number of satellites, and some of them have turned out to be unusual.Charles ...
- 우리의 조상인 실러캔스과학동아 l1991년 08호
- among other animals.Some lungfish are even likely to drown if they cannot be in a position to gulp air now and then.A number of biologists believe that lungfish are the ancestors of the tetrapo ...
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