美国人约翰的度假屋距离北美五大湖中的安大略湖岸约8米远，3月初的一场寒冷风暴侵袭了他的度假屋，将这里的一切都冻成了“冰雕”。据此完成下列各题

若直线$ax+by=2$经过点$M\left(\cos \alpha ,\sin \alpha \right)$，则 （    ）

阅读下面选文，回答问题。
    言未毕，阶下一人大呼出曰：“小将愿往斩华雄头，献于帐下！”众视之，见其人身长九尺，髯长二尺，丹凤眼、卧蚕眉，面如重枣，声如宏钟，立于帐前。绍问何人。公孙瓒曰：“此刘玄德之弟关羽也。”绍问现居何职。瓒曰：“跟随刘玄德充马弓手。”帐上袁术大喝曰：“汝欺吾众诸侯无大将耶？量一弓手，安敢乱言！与我打出！”曹操急止之曰：“公路息怒。此人既出大言，必有勇略；试教出马，如其不胜，责之未迟。”袁绍曰：“使一弓手出战，必被华雄所笑。”操曰：“此人仪表不俗，华雄安知他是弓手？”关公曰：“如不胜，请斩某头。”操教酾热酒一杯，与关公饮了上马。关公曰：“酒且斟下，某去便来。”出帐提刀，飞身上马。众诸侯听得关外鼓声大振，喊声大举，如天摧地塌，岳撼山崩，众皆失惊。正欲探听，鸾铃响处，马到中军，云长提华雄之头，掷于地上。其酒尚温。

(an extract from Stuart Little)

    When Mrs. Frederick C. Little's second son arrived, everybody noticed that he was not much bigger than a mouse. The truth of the matter was, the baby looked very much like a mouse in every way. He was only about two inches high; and he had a mouse's sharp nose, a mouse's tail, a mouse's whiskers(胡须)，and the pleasant, shy manner of a mouse. Before he was many days old he was not only looking like a mouse but acting like one, too-wearing a gray hat and carrying a small cane(手杖).Mr. and Mrs. Little named him Stuart, and Mr. Little made him a tiny bed.

    Unlike most babies, Stuart could walk as soon as he was born. Mrs. Little saw right that the baby clothes she had provided were unsuitable, and she set to work and made him a fine little blue suit. Every morning, before Stuart dressed. Mrs. Little went into his room and weighed him on a small scale(称)which was really used for weighing letters. At birth Stuart could have been sent by first class mail, but his parents preferred to keep him rather than send him away. At the age of a month, he had gained only a third of an ounce(盎司), his mother was so worried that she sent for the doctor.

    The doctor was happy with Stuart and said that it was very unusual for an American family to have a mouse. He took Stuart's temperature and found that it was 98.6, which is normal for a mouse. Everything seemed to be all right, and Mrs. Little was pleased to get such a good report.

    "Feed him up!" said the doctor cheerfully, as he left.

    The home of the Little family was a pleasant place near a park in New York City. In the mornings, the Littles were up early as a general rule. Stuart was a great help to his parents, and to his old brother, because of his small size and because he could do things that a mouse can do and was willing to do them.