题目

一个质量为2kg的物体，在5个共点力作用下处于匀速直线运动状态 现同时撤去大小分别为10N和15N的两个力，其余的力保持不变，关于此后该物体运动的说法中正确的是 A . 可能做匀减速直线运动，加速度大小是 B . 可能做匀速圆周运动，向心加速度大小是 C . 一定做匀变速直线运动，加速度大小可能是 D . 可能做匀变速曲线运动，加速度大小可能是My teeth（牙齿）screamed. I couldn’t    them any longer. I finally      my fear of dentists(牙医) and decided to get them fixed. But    ? I was a college student(大学生) and barely（勉强）   myself with part-time jobs.Maybe I could    the worst one. I opened the Yellow Pages and called the first    within walking distance. The receptionist（接待员）told me to come right over.      I hurried across the school. I forgot the    in worrying about how I would pay the   .In a few minutes I was being examined by a dentist who said, “Hmm!” as he examined my teeth. “Your teeth are in bad    .”“I already knew that,” I   him and answered quickly to hide (隐藏) my   .“But don’t worry. I’m going to fix them.”“No, you’re not. I can’t    to pay you.” I started climbing out of the chair.“You’re a student at the university, aren’t you?”What   did that make? “Yes...”“You’re going to graduate in a few years, aren’t you?”“I hope so.”“And then you expect to get a job, don’t you?”“That’s my   .”“Well, then you’ll pay me.         you concentrate (集中精力) on your classes and      the dentistry to me.”I stared at him. He really      it. He calmly picked up his tools and fixed my aching teeth. From that day on, I saw him every week until I had good teeth again. After graduation, I got a job and      his bill in a few months.In the 40 years following, I’ve learned to call this man a “woodwork angel.” They are strangers who appear out of nowhere when I need help. sometimes they’ve rescued me      danger or making a big mistake.【小题1】  A．bear (忍受) B．take C．treat D．forget 【小题2】  A．identified B．admitted C．ignored D．expressed 【小题3】  A．where B．who C．why D．how 【小题4】  A．changed B．provided C．supported D．enjoyed 【小题5】 A．visit B．fix C．call D．cover 【小题6】  A．teacher B．dentist C．driver D．operator 【小题7】 A．As B．After C．Since D．Though 【小题8】  A．class B．time C．address D．pain 【小题9】 A．bill B．debt C．tax D．visit 【小题10】 A．shape B．order C．size D．situation 【小题11】 A．directed B．comforted C．stopped D．advised 【小题12】 A．anger B．fear C．hope D．trick 【小题13】 A．agree B．wait C．afford D．remember 【小题14】 A．effort B．use C．difference D．offer 【小题15】 A．plan B．picture C．purpose D．procedure 【小题16】 A．As a result B．In the meantime C．After that D．Ever since 【小题17】 A．present B．show C．bring D．leave 【小题18】 A．appreciated B．meant C．approved D．made 【小题19】 A．passed B．had C．settled D．filled 【小题20】 A．to B．in C．against D．from