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【简答题】

APRIL 5 marks the 100th anniversary(周年纪念日)of the sinking(下沉)of the Titanic. In 1997, the movie Titanic was a huge hit all around the world. Now, the 3-D version of the movie will come to Chinese theaters on April 10.
As anyone who has seen the movie knows, the Titanic struck an iceberg(冰山) and sank on its first voyage in 1912, killing 1,517 people. A century after the accident, scientists have found something new to blame(负责任) for the sinking: the moon. Donald Olson, a Texas State University physicist, led a team of astronomers(天文学家) to examine the moon’s role, according to Reuters.
Normally, icebergs stay in place and cannot move until they melt enough or a high tide(潮汐) frees them. A single iceberg can become stuck many times on its journey southward. The process can take several years.
According to Olson, a hundred years ago the moon made its closest approach to the Earth in more than 1,400 years. This caused the moon to have a much stronger pull on the Earth’s oceans than usual, which created a super-high tide. The tide pushed icebergs from shallow waters off the coasts of Canada’s provinces, Newfoundland and Labrador, into the Titanic’s way.
“Of course, the final cause of the accident was that the ship struck an iceberg,” Olson told Reuters. “It went full speed into a region with icebergs, but the lunar connection(月亮的联系) may explain how an unusually large number of icebergs got into the path of the Titanic.”
The research team will publish their research in the April issue of Sky & Telescope magazine.
根据短文内容,选最佳择答案,并在答题卡上按要求作答。
小题1: How many people lost their lives in this accident?A.Over 2,000 people.B.About 100 people.C.More than 1,500 people.D.We don’t know.小题2: The underlined word “voyage” in the second paragraph really means ______.A.航行B.飞行C.划船D.游泳小题3: Which of the following about icebergs is TRUE?A.Icebergs move only when the tide frees them.B.An iceberg can stop for some time during its travel.C.An iceberg will move as soon as its melts.D.It takes an iceberg several months to leave its place.小题4: Which of the following played a role in the sinking of the Titanic?
a. the moon b. the tides c. too many passengers
d. the high speed of the ship e. going the wrong way f. the icebergA.a,b,c,fB.a,c,d,eC.a,b,d,fD.a,c,e,f小题5:. What is the article mainly about?A.The main cause of the Titanic’s sinking.B.The 100th anniversary of the Titanic.C.The moon’s great influence on the Earth’s tides.D.The moon’s role in the sinking of the Titanic.

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题目标签:下沉天文学航行
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【单选题】A.下沉 B.侧方移动 C.前后翘动 D.左右摆动 E.弹跳

A.
一患者,缺失,余留牙正常。可摘局部义齿设计为三臂卡环,舌杆大连接体。此义齿最容易出现的不稳定表现是()

【多选题】一艘航行于内河的45m客船,关于驾驶室安装的电动舵角指示器,下列叙述正确的有哪些()

A.
舵角指示装置应由独立分路供电
B.
舵角指示装置与实际舵角的误差精度应不大于1.5度
C.
舵角指示装置与实际舵角的误差精度应不大于1度
D.
驾驶室的舵角指示装置应有亮度可调的照明灯或夜光刻度

【单选题】船舶沿岸航行时,计划航线应拟定在()。

A.
10米等深线以内
B.
离岸10海里之外
C.
水深的2倍以上
D.
离岸3海里以上

【多选题】下列对我国古代天文学成就的描述中,正确的是

A.
诗经中有中国历史上第一次有确切日期的月食记录
B.
春秋保存了世界上关于哈雷彗星的最早记录
C.
甘石星经是世界上最早的天文学著作,书中记录了800多个恒星的名字,并划分其星宿与体系,对后世发展颇具影响。
D.
汉书五行志中有世界公认的较早的黑子记录
E.
隋朝和尚一行在世界上第一次测量出地球子午线长度,他通过观察发现了恒星位置移动现象

【单选题】射电天文学开始于什么年代?()

A.
20世纪初
B.
20世纪30年代
C.
20世纪60年代
D.
20世纪90年代