问题
不定项选择
某列机械波在MN直线上传播，该直线上相距3m的P、Q两质点，其振动图象如图所示，则
A、该机械波的频率为2.5Hz
B、该机械波的传播方向一定是从P到Q
C、该机械波的波长可能为4m
D、该机械波传播的速度可能为15m/s
答案
CD
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某列机械波在MN直线上传播，该直线上相距3m的P、Q两质点，其振动图象如图所示，则
A、该机械波的频率为2.5Hz
B、该机械波的传播方向一定是从P到Q
C、该机械波的波长可能为4m
D、该机械波传播的速度可能为15m/s
CD
任务型阅读 (共5小题；每小题1分，满分5分) 请阅读下面短文，在短文后表格中的空白处填上适当的单词（注意：每空1个单词}。 Don’ t Rest on Your Laurels Have you ever heard the saying “Don’t rest on your laurels”？“ Laurels” means the achievements you have already got. The saying suggests that you shouldn’t be so satisfied with your achievements that you’ll no longer try to improve. As to this saying, Mike Perham has set us a good example. Born in 1992 in Hertfordshire, England, Mike was just 14 when hebecame the youngest person to sail across the Atlantic Ocean. You might think the achievements are good enough, but Mike doesn’t think so. At the age of 17，he became the youngest person to sail all by himself around the world on a nine-month voyage(航海). Mike is now 19, and he is still trying his bestto break the records and push himself further. For his next adventure, he plans to fly around the world on his own, making him the first person of all ages to both sail and fly around the world. Mike wants his achievements to encourage young people to realize their dreams. Since his adventures, he has travelled widely, speaking at schools and youth clubs in the UK, Hong Kong and Australia on the theme of “Live the Dream”. Amazing Facts: Mike started sailing when hewas seven. His trans-Atlantic crossing began at Gibraltar and ended in Antigua. His round-the-world yacht(游艇)was called TotallyMoney.com. Title：Don’t Rest on Your Laurels
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