如图所示，环形导线周围有三只小磁针a、b、c，闭合开关S后，三只小磁针N极的偏转方向是（   ）

I regret ______ you that you will miss your flight if you don’t hurry up. You have only twenty minutes to go.

阅读理解

                                                                                 Is There Life on Earth

    There was great excitement on the planet of Venus this week. For the first time Venusian scientists managed to land a satellite on the planet Earth, and it has been sending back signals as well as photographs ever since.

    The satellite was directed into an area known as Manhattan(named after the great Venusian astronomer Prof. Manhattan, who first discovered it with his telescope 20,000 light years ago). Because of excellent weather conditions and extremely strong signals, Venusian scientists were able to get valuable information as to the feasibility(可行性)of a manned flying saucer(飞碟)landing on Earth. A press conference was held at the Venus Institute of Technology.

    “We have come to the conclusion, based on last week's satellite landing,” Pro. Zog said, “that there is no life on the Earth.”

    “How do you know this?” the science reporter of the Venus Evening Star asked.

    “For on thing, Earth's surface in the area of Manhattan is composed of solid concrete and nothing can grow there. For another, the atmosphere is filled with carbon monoxide and other deadly gases and nobody could possibly breathe this air and survive.”

    “What does this mean as far as our flying saucer program is concerned?”

    “We shall have to take our own oxygen with us, which means heavier flying saucer than we originally planned.”

    “Are there any other risks that you discovered in your studies?”

    “Take a look at his photo. You see this dark black cloud floating over the surface of Earth?” We call this the Consolidated Edison Belt. We don't know what it is made of, but it could give us a lot of trouble and we shall have to make further tests before we send a Venus Being there.”

    “If what you say is true, won't this set back the flying saucer program several years?”

    “Yes, but we shall proceed as soon as the Grubstart gives us the added funds.”

    “Pro. Zog, why are we spending billions and billions of zilches to land a flying saucer on Earth when there is no life there?

    “Because if we Venusians can learn to breathe in an Earth atmosphere, then. We can live anywhere.”

阅读下面的文言文，完成下题。厓门^①吊古记
【明】方良永
    弘治甲子春二月丙午，予出按海北，取道新会县。县官属谒既，予进知县罗侨，语之曰：“厓山之事，千古痛愤。办香敬吊，行与子偕。”乃具牲帛，僦民舟习海行者以行。
    夜二鼓，乘汐出港口，风静波平。天未明抵岸。启篷窗，东视厓门甚迩，景色曚曚未辨。登岸，典祠者逆于道左。少顷至祠下，达观殿宇碑亭，考其营建颠末。中祀文天祥、陆秀夫、张世杰三公，两庑皆祀同时死节诸臣。其额与祭，则皆上请于朝，得旨俞允者也。观礼毕，易便服，穿丛薄间，从西上直至山巅。转顾后山苍翠，亭耸如扆^②；环视左右山，逶迤盘踞，如虎伏龙行，水绕其势如弯弓。隔岸诸峰层叠，秀丽如画。较以形胜，此亦足恃，而顾不能救国之亡，岂地势无与于人事；抑天命已去，非此所能胜欤？悄然而退。
    予回舟次，伫立岸上，见水鸟飞鸣而下上，渔歌互答于两涯。追思往事，黯然伤怀。徘徊间，典祠者曰：“前有奇石可往观。”予遂乘小舟径诣石处，蹑磴仰视，巨石如屏。屏石有刻，已磨灭不可读。顾问典祠者，云旧有大刻“元柱国将军张弘范灭宋于此”。近巡按广平徐公瑁易刻曰：“宋丞相陆秀夫太傅张世杰死事于此。”今石长字没矣。予窃论弘范宜不足责宋之执政以国与人如弃遗余恬不知恤非得二公振起其间天理民彝^③或几乎息。彼弘范犹元臣也，何足深咎。况二三公之名实，昭然史册间，当与日月争光；区区摩崖^④ ， 胡能轻重，而必与之较争哉！
    因与罗尹论厓山事：谓当宋室播迁之时，三公非顾命大臣，皆无与国休戚存亡之义，即使不死，亦无敢非之者。今其孤忠大节，乃出于寻常之所不料，此所以尤使后人追思景慕，不容但已也。祠有田三顷余，乃知县割废寺遗业所充。又山故无虎豹，居民素不为盗，巡司虽设，频年无捕获功。天既薄暮，予独坐舟中，感今念昔，屡就枕而不成寐。
    既竣事，咸曰：“自有厓山之行，天日无此晴霁，风波无此平妥也。”
（选自《方简肃文集》卷五，有删节）
【注】①厓门：即崖山，位于广东新会南大海中。南宋末，宋军与张弘范统帅的元军在此决战，宋军全军覆没，张世杰、陆秀夫等大臣及宋少帝赵昺殉国，宋亡。②扆（yǐ）：屏风。③民彝：人伦。④摩崖：在山崖上书刻文字。

下列有关鉴别二氧化碳、氧气的方法错误的是（   ）