A swift current occurring in a narrow passage connecting two large bodies of water which is produced by the continuously changing difference in height of tide at the two ends of the passage is called a(n)（）.
Which of the following is the reason that the metacentric height is a valid measure of only the initial stabilit?（）.
Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from（）.
The ratio of the height of a vessel’s rudder to its width is referred to as the（）.
A tropical wave is located 200 miles due west of your position，which is north of the equator. Where will the wave be in 24 hours? （）
The length of a wave is the length（）.
A swift current occurring in a narrow passage connecting two large bodies of water，which is produced by the continuously changing difference in height of tide at the two ends of the passage，is called a（）.
A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is（）.
Which of the following is the reason that the metacentric height is a valid measure of only the initial stability?（）.
（）is a radio receiver with ablity to sense direction of the incoming radio waves.
The condition where a ship on the end of a tow line is riding a wave crest at the same time as its tug rides a wave crest is known as riding in（）.
The average height of the surface of the sea for all stages of the tide over a 19 year period is called（）.
Which of the following statements is NOT considered a characteristic of farming in the late 18th and early 19th centuries?（）
The height of a VHF radio antenna is more important than the power output wattage of the radio because（）.
In mid-ocean，the characteristics of a wave are determined by three factors. What is NOT one of these factors?（）
182. The length of a wave is the length ______.
77. What is the distance from the bottom of a wave trough to the top of a wave crest?
99. At a spot where the charted depth is 15 m, and the tidal height is -1.3 m, then the actual depth of the water is ____
118. In mid-ocean, the characteristics of a wave are determined by three factors. What is NOT one of these factors?
129. The average height of the surface of the sea for all stages of the tide over a 19 year period is called _____.
The height of a 1-year-old boy is about ?
The first shiploads of immigrants bound for the territory which is now the United States crossed the Atlantic more than a hundred years after the 15th- and 16th-century explorations of North America.
The basic principle of radar is illustrated by what happens when one shouts in a e. The echoof the shouting 11 the walls helps a person determine the size of i cave. With radar, however , the waves are radio waves instead of 12 waves. dio waves travel 13 the speed of light, about 300,000 kilometers in a second. A lar set 14 a short burst of radio waves. Then it receives the echoes 15 when waves bounce (Silt) off objects. By determining the time it 16 for the echoes to imi to the radar set, a trained technician 17 determine the distance between the [ar set and other objects. The word "radar", 18 , gets its name from the term dio detection and ranging." "Ranging" is the term for detection of the 19 between object and the radar set.
3、一棵有510个结点的完全二叉树的高度为多少？（独根树高度为1) What is the height of a complete binary tree with 510 nodes？ （the height of a tree with only a root is 1)
