题目

阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。It's hard to talk todads sometimes. The roles we often expect our fathers to play—protector, provider—can make them difficultto understand. That's how it was with my dad. He came to Canada at the age often and settled in an immigrant community. He was never much of a talker. Herarely drank. He didn't tell stories about himself at the dinner table or whenwe went for walks in the park. He was a private person and seemed to want tostay that way. It seemed impossibleto ask him questio声呐在海洋勘察和军事方面都是一种重要的仪器。从知识上看，它是一种能定向发射和接收________(选填“超声波”或“次声波”)的设备。