题目

用括号中所给单词的适当形式完成下列句子。 (每空仅限 1个单词 ) 1． Jenny has found it easy to make _____ at school. (friend) 2． — Do you think there’ll be any cheese left? — ________ it. (doubt) 3． — Uncle John seems to be more ______ today. — Yeah. He’s got his favorite stamp. (cheer) 4． Dad, making my own decision is part of ______ up. (grow) 5． _______ speaking, the house is not quite our style. (honest) 6． It goes without saying that home is the ______ place in the world. (warm) 7． The new bridge, which is sea crossing, has been _（本小题满分12分）         某气象仪器研究所按以下方案测试一种“弹射型”气象观测仪器的垂直弹射高度：在C处进行该仪器的垂直弹射，观测点A、B两地相距100米，，在A地听到弹射声音的时间比B地晚秒，A地测得该仪器在C处时的俯角为15°A地测得最高点H时的仰角为30°，求该仪器的垂直弹射高度CH（声音的传播速度为340米/秒）