海船船员考试
单选题A tide is called diurnal when（）.A only one high and one low water occur during a lunar dayB the high tide is higher and the low tide is lower than usualC the high tide and low tide are exactly six hours apartD two high tides occur during a lunar day
题目
only one high and one low water occur during a lunar day
the high tide is higher and the low tide is lower than usual
the high tide and low tide are exactly six hours apart
two high tides occur during a lunar day
相似问题和答案
第1题：
The period at high or low tide during which there is no change in the height of the water is called the ______.
A.range of the tide
B.plane of the tide
C.stand of the tide
D.reversing of the tide
第2题：
The average height of the surface of the sea for all stages of the tide over a 19 year period is called ______.
A.mean high water
B.mean low water
C.half-tide level
D.mean sea level
第3题：
A、doing
B、did
C、to do
D、do
第4题：
five to seven times the depth of water
seven to ten times the depth of water
twice the depth of water
twice the depth of water plus the range of tide
第5题：
大潮（spring tide）与小潮（neap tide）
正确答案: 由以太阳，月亮为主的天体引力变化引起的地表水体周期性升降的现象叫潮汐，当地日月三者在一条直线上时（农历初一，十五），日月对地球的引力叠加而使地球水质点受到的引力最大，这时地球上的高潮最高低潮最低，潮差最大，称为大潮；当地日月三者构成直角三角形时（地球处于直角顶点）（农历初七，二十二），地球水质点受到的引力最小，这时地球上的高潮位最低，低潮位最高，两者的垂直距离最小，称为小潮。大小潮的周期是14.8天。但真正达到最大及最小潮差的时间比原时间有一定滞后。
第6题：
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.hydraulic current
B.rectilinear current
C.rotary current
D.harmonic current
第7题：
B.contact
C.agreement
D.an agreement
第8题：
The meaning of ebb tide is that ______.
A.tide is falling from high water to low water
B.tide is rising from low water to high water
C.tide is reaching to a highest level
D.tide is reaching to a lowest level
第9题：
有时风大流急，船舶靠码头时必须掉头顶流。（）
- A、A ship has to turn to stem the tide because the wind is strong when she is getting alongside a wharf.
- B、Sometimes the wind is strong and the current is rough, so a ship has to turn to stem the tide when she is getting alongside a wharf.
- C、The wind is big, a ship must get alongside a wharf so she has to turn to stem the tide.
- D、A ship has to turn to stem the tide so she can get alongside a wharf.
正确答案:B
第10题：
slack away
take on
take in
adjust