【单选题】
[1/52]The movement of water away from the shore or downstream is called a(n)().
参考答案:
B
参考解析:
无
【单选题】
[2/52]The velocity of the wind,its steady direction,and the amount of time it has blown determines a wind ...
参考答案:
D
参考解析:
无
【单选题】
[3/52]Neap tides occur().
A.
the start of spring,when the Sun is nearly over the equator
B.
Only when the Sun and Moon are on the same sides of the Earth and are nearly in line
C.
When the Sun and Moon are at approximately 90° to each other,as seen from the Earth
D.
When the Sun,Moon,and Earth are nearly in line,regardless of alignment order
参考答案:
C
参考解析:
无
【单选题】
[4/52]River currents tend to().
A.
pick up speed where the channel widens
B.
run slower in the center of the channel
参考答案:
D
参考解析:
无
【单选题】
[5/52]You are anchoring in a river where the current is from one direction only.The best way to lay out tw...
A.
Directly in line with the bow
B.
Side by side,with their lines on the port and starboard side
C.
So that their lines form an angle
参考答案:
C
参考解析:
无
【单选题】
[6/52]Neap tides occur only().
B.
when the Sun,Moon,and Earth are in line
C.
at approximately 28-day intervals
D.
when the Moon is at quadrature
参考答案:
D
参考解析:
无
【单选题】
[7/52]When there are small differences between the heights of two successive high tides or two successive ...
参考答案:
B
参考解析:
无
【单选题】
[8/52]Neap tides occur when the().
A.
Moon is in its first quarter and third quarter phases
B.
Sun and Moon are on opposite sides of the Earth
C.
Moon's declination is maximum and opposite to that of the Sun
D.
Sun and Moon are in conjunctio
参考答案:
A
参考解析:
无
【单选题】
[9/52]To make sure of getting the full advantage of a favorable current,you should reach an entrance or st...
A.
One hour after the predicted time
C.
30 minutes before flood,one hour after an ebb
D.
30 minutes before the predicted time
参考答案:
D
参考解析:
无
【单选题】
[10/52]The best time to work a boat into a slip is().
A.
when the wind is against you
B.
with the current setting against you
参考答案:
C
参考解析:
无