The surface of the moon is ___.A．so hot that it wa

单项选择题

Questions 53 to 56 are based on the following passage: Following the end of the Apollo space program, the National Geographic Society published anarticles about the moon. Here, in shorter form, are some questions and answers from one ofthese articles. Is the moon like the earth Yes and no. It is more like it than many scientists thought before Apollo. Like the earth, the moon is inlayers, with a crust on the outside and a deep mantle below. It may also have a core, as the earth does.However, the crust is almost four times thicker than the earth’s crust. We do not know much yet about themoon’s mantle, that section of superheated rock which goes down hundreds of miles below the crust. Wethink~but we are not sure that the moon has a center core which includes molten rock, a.s the earth does. In other ways, of course, the moon is very different. There is no life, and there is no water. The makeupof its atmosphere is very different; the earth creatures cannot breathe in it. Is the moon hot or cold Most scientists agree that some of the moon was hot for at 1east a time. Rocks from the moon show thatthey were once melted. Right now there seems to be heat someplace inside the moon, possibly a great deal ofit. On the surface, however, there is no sign of heat -- no volcano, for example. The surface itself ranges fromheat of 230 F to cold of minus 290~F, depending upon where the sun is. Where did the moon come from We don’t know. The three main theories (ideas) are (1) that the moon was horn from the earth, (2) thatthe earth and the moon were born together at the same time from the same cloud of gas and dust, and (3) thatthe moon was born someplace else in the solar system and then captured by the earth’s gravity. So far, noneof these theories has been proved to be either fight or wrong. Professor George W. Wetherill of theUniversity of California in Los Angeles says that he would give the first two -theories each a 10 percentchance and the third theory a 20 percent chance. The other 60 percent he would give to "things we haven’tthought of yet."

The surface of the moon is ___.

A．so hot that it warms the earth
B．much colder at all times than the earth
C．about the same as that of the earth in terms of heat and cold
D．sometimes much hotter, sometimes much colder than the earth