187.When there are small differences between the heights of two successive high tides or two successive tides, the tides are called _____.
举一反三
- Mean high water is the average height of（）. A: The higher high waters B: The lower high waters C: The lower of the two daily tides D: All high waters
- 96. The datum from which the predicted heights of tides are reckoned in the tide tables is _____.
- 检查之间的最短时间是两分钟。 A: The minimum time between checks is two minutes. B: Allow at least two minutes between successive checks. C: The least interval between successive checks is two minutes.
- 允许连续检查之间至少间隔两分钟。 A: The minimum time between checks is two minutes. B: Allow at least two minutes between successive checks. C: The least interval between successive checks is two minutes.
- 207. Spring tides occur_____