题目

西瓜嫁接育苗技术是克服土壤传播病虫害最为有效的手段。在西瓜嫁接时，不同光照强度对西瓜嫁接苗生长是否有影响？科研人员选择了西瓜品种“早佳84-24”100株作为接穗，葫芦品种“将军”100株作为砧木对此展开了研究，结果如下：不同光照强度对西瓜嫁接苗生长的影响（100株的平均值） 组别 光照强度 μmol•m-2•s-1 6月24日（嫁接时） 7月11日（嫁接后） 砧木茎高cm 接穗高cm 砧木茎高cm 接穗高cm 甲 100 2.8�It was just three degrees above zero. “That’s cold,” thought Jane as she got ready to deliver her morning papers. Jane had 50 customers, and on cold mornings when she couldn’t ride her bicycle, it took her more than an hour to make her rounds. As she collected her papers and put them into a big canvas bag, Jane regretted that she hadn’t finished her math homework the night before. There was still time. She’d hurry with the papers and finish the math before breakfast. Less than an hour later, Jane was nearly finished. She had only five customers to go. She could then head for home to complete her math while her room fixed breakfast. As she rounded the corner, she saw a car in the middle of the street. It was Mr. Zimmerman, the elder man, who walked with a walking stick. His car was out of gas. “I’d like to help Mr. Zimmerman,” thought Jane, “but if I do, I won’t have time to do my homework.” She hated to think what Mr. Roberts would say if she hadn’t completed her papers. “It’s his own fault for running out of gas,” Jane talked to herself. “The station is only a half mile down the street. Surely Mr. Zimmerman can walk that far, even on a cold morning like this --- can’t he? ” As she walked down the street, Jane wondered what to do. 1.Jane delivers her paper______. A．before she goes to school B．on cold morning C．with the help of Mr. Zimmerman’s car D．on the way to school 2.Mr. Zimmerman was old and_______. A．couldn’t drive well B．would have nobody to help him C．was not rich enough to buy gas D．was not able to walk a long way 3.We know from the reading that______. A．Jane couldn’t find any time to finish her homework B．it took about an hour for Jane to send the papers C．Jane would have her breakfast in the school D．Jane likes to deliver papers on cold mornings 4. The reading doesn’t say but we can infer(推断) that_____. A．Jane bought the gas for Mr. Zimmerman B．usually Jane delivers papers by bike C．Mr. Robert doesn’t like Jane at school D．Mr. Zimmerman had to leave the car for Jane