学必求其心得，业必贵于专精 河北定州中学 2017—2018 学年第二学期高四英语开学考试 第一部分：听力（共两节， 20 小题 ,每小题 1 分，满分 20 分）第一节 听下面 5 段对话。每段对话后有一个小题，从题中所给的 ng every detail of it. C。 Hearing young musicians play. 14。 How does the man advertise the course？ A 。 Through the Internet. B 。 Through the university 。 C. Through the TV show. 15. What is required to join the course？ 2 学必求其心得，业必贵于专精 A 。 Perfect performance. B. Basic English skill. C. Good looks. 16. Why isn ’ t the countryside a good choice？ A. It's too spacious。 B. It ’toos quiet. C. The transport isn ’ t convenient. 听下面一段独白，回答第 17~20 四个小题。 When should parents pick up their kids at the latest on Thursday? A 。 At 1:00pm. B。 At 11：30 am. C。 A 12：30 pm。 What ’ s the advantage of ordering supplies from school? A. It is very convenient. B. It has a free delivery. C。 It will cost much less。 19。 What does the community charity do？ A. Help people in need。 B. Look for missing things. C. Donate things to the school. 20。 Who will get a call the night before school starts? A 。 New students。 B 。 Teachers. C. Returning students. 二、阅读理解 Dry Ice is a unique substance which has many uses。 Essentially, dry ice is frozen CO2 。 The first report of what we now call dry ice came from the French chemist Charles Thilorier in 1834. In 1924, the Drylee Corporation of America named the solid form of CO2 as "Dry Ice ”， which is what it is popularly called today. At normal atmospheric pressure， CO2changes directly from solid to gas. It skips the liquid phase（阶段 )which makes regular ice wet. Frozen CO2is also much colder than regular ice. But regular ice freezes at 32 degrees Fahrenheit, CO2 changes from gas to solid at —109。3 degrees Fahrenheit. This extremely cold temperature makes it very dangerous to handle with bare hands。 It can cause frostbite in a very short period of time. Dry ice has been used for a variety of purposes throughout the past 3 学必求其
