From 1996 to 1999, the Galileo spacecraft passed through the Jovian system, providing much information about Jupiter's satellites. Callisto, the outermost of Jupiter's four largest satellites, orbits the planet in seventeen days at a distance from Jupiter of two million kilometers. Like our own Moon, Callisto rotates in the same period as it revolves, so it always keeps the same face toward Jupiter. Its noontime surface temperature is only about -140°C, so water ice is stable on its surface year-round. Callisto has a diameter of 4.820 kilometers, almost the same as that of Mercury. Its mass is only one-third as great, which means its density must be only one-third as great as well. This tells us that Callisto has far less of the rocky metallic materials found in the inner planets and must instead be an icy body through much of its interior.
에서 왜 B가 답이 안되죠??
1.According to paragraph 1, which of the following statements about Callisto is true?
1. Its surface temperature is constant at all times of the day.
2. It completes one rotation every seventeen days
이게 2번이 답인데요.
2 번인 답인 이유가 파란색 문장 때문인가요? 근데... 이렇게 되면 문제는 Fact를 골라야 하는데 사실을 고르는게 아니라 약간 추측이 예상되는 문제 아닌가요?
1번을 골랐는데 주황색 문장 때문에요. year around = constant at all times of the day 안되나요??
고수님들 .. ㅠㅠ 이런문제 너무 싫어요.
팁좀 주세요 ㅠ