题目

按照达尔文的生物进化理论，生物进化的内因是A. 生物的过度繁殖 B. 产生了可遗传的变异C. 生存竞争 D. 产生了有利的变异 答案：【答案】B【解析】生物进化的动力是生存斗争，内因是遗传变异，外因是自然选择。生物在繁衍的过程中，会不断地产生变异，其中的许多变异是能够遗传的，这些不断发生的可遗传的变异是生物进化的基础。生物在生存过程中，既要与自然环境进行斗争，又要与其他生物进行斗争。自然选择使不断变 阅读下面短文，然后按要求完成下列各题。 　　Late last night Jennifer Johnstone, a 19-year-old American student, (A)和她的男朋友吵了架, so she left his house at 2∶50 in the morning and drove off．She was driving in thick fog along a road in Saint Pierce when she made a mistake at a corner and went off the road．(B)Her car fell over a 160m cliff(悬崖)．Jennifer(C)________ out of her ear, and landed 18m from the sea．When she came to herself, she realized that she still had her mobile phone． 　　She dialed 999(the emergency number), but she did not have a clear mind, so she had to make several calls before(D)she could finally make herself understood by the ambulance(救护)people．While she was waiting for help to come she could see that the sea was coming closer every moment．She lay there, feeling terrified, watching and waiting．Suddenly she heard the noise of a helicopter in the sky above． 　　(E)The helicopter took about half an hour to see exactly where Jennifer was, but in the end it managed to reach her．By the time the helicopter took off, the waves were just about one metre away．At last, she was sent to the nearest hospital where she is now recovering．“It was so lucky that I had my mobile phone with me,”she said to journalists,“because if I hadn't been able to phone for help, I would surely have died．” 1．将画线部分(A)译成英语：________ 2．将画线部分(B)译成汉语：________ 3．在(C)的空白处填入一个适当的词语：________　________ 4．将画线部分(D)改写为：she could make the ambulance people ________　________ 5．将画线部分(E)改写为：The helicopter ________ about half an hour in ________ exactly where Jennifer was．