题干

王亮把耳朵贴在长铁管的一端,小芳在另一端击打铁管,王亮先后听到两个响声,先听到的是由____传来的响声,这说明声音在____中传播比在​____中要快.

上一题 下一题 0.0难度 选择题 更新时间:2018-07-05 09:30:10

答案(点此获取答案解析)

铁管,固体,气体

同类题2

阅读理解

    A cat is recovering in California after surviving a 6,500-mile journey across the Pacific stowed inside a Chinese shipping container without food or water. Staff and volunteers have named it “Ni Hao”, which is Chinese for “hello”.

    It was discovered breathing shallowly after a two-week trip across the Pacific Ocean. The cat was seriously suffering from loss of water and starvation when the container was opened in California last week, but was said to be doing well after being sent to the Carson Animal Care Centre in Los Angeles. At first it was too weak to stand, but finally took its first steps. Then it ate a good meal and slept soundly. The cat woke up on Thursday morning, physically in a better condition than 24 hours ago.

     “Ni Hao greeted the medical team with its first meow this morning and is attempting to stand,” said Marcia Mayeda, head of the Los Angeles Department of Animal Care and Control. Aaron Reyes, director of the Department, added, “We finally got to hear its voice. It sounds like a single-engine plane.”

    Ni Hao is expected to be observed for 60 days but afterwards animal workers will look forward to providing it with a good shelter. “It's much better for it to recover in a home environment,” Mr. Reyes said. “It's just like a human being in a hospital so we're hoping to move it.” He added, “Little by little we're getting there. We're hoping that under the treatment and with rest, it'll be able to recover quickly.”

    It was not immediately clear how the cat got into the container.

同类题4

阅读下列材料,回答问题。

材料一 秦始皇为维护统治的需要,将商鞅以来的律令加以补充修订,形成《秦律》。其中《盗律》中明确规定:严禁对私有土地的侵犯,私自移动田界者,要判处“耐”刑(剃去鬓发,表示犯罪);还规定:士伍偷盗110钱者,要判处四年徒刑;盗采别人桑叶不满一钱者,要判处劳役30天。不仅对偷盗者本人处以严刑,对共犯、知情者或偷盗者的家属也要同样处罪。《秦律》主要内容是维护统一的专制主义中央集权封建国家的经济制度;镇压农民的反抗活动;保护官僚地主特权的诉讼制度和监狱管理制度。

——朱绍侯等《中国古代史》

材料二 “如果在夜里行窃的人被人当场杀死,则这种杀人的行为被认为是合法的。”

——《十二铜表法》第八表,第十二条

“一家之主有权将其财产和奴隶遗留给任何他所喜爱的人。假如一个人死后没有遗嘱,也没有继承人,就在父系亲族中找一位最亲近的亲属作为继承人。”“假如奴隶偷窃或使主人受损,可以将奴隶拍卖以补偿主人的损失。”

——《光复彩色百科大典》《世界历史》

材料三 中国梦的实现离不开制度建设,离不开法治保障。“中国梦”、“人民”、“法治”成为***讲话中的关键词。中国的进步与中华民族的复兴离不开法治的发展,法治兴则中国兴,法治废则中国危。法治不仅是国家富强、人民幸福的制度保证,也是社会主义政治文明的重要内容,是实现中国梦的制度基础。

——《中国青年报》

请回答: