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_____ed ucation is the instruction that occurs when the instructor and studen t s are separated by distance or time,or both.

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

The news report tells us that when the crash occurred_________.
The tides vary ___ the moon
1_____education is the instruction that occurs when the instructor and students are separated by distance or time,or both
潮汐周日不等(diurnal inequality of tide)的现象为()。
When the Pilot is embarked he or she ().
When the pilot is embarked he or she().
A tide is called diurnal when().
A vessel is tide rode when it is().
Neap tides occur when the().
Stand of the tide is that time when().
I expect to()when tide rises.
Fog is likely to occur when there is little difference between the dew point and the().
When there are small differences between the heights of two successive high tides or two successive low tides,the tides are called().
The()enables water to be blow down or emptied from the boilerIt may be used when partially or completely emptying the boiler.
The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and () of the pistons in the cylinders.
Neap tides occur only().
The guard, fencing or shielding for moving parts or machinery can be removed for repair only when the machinery it belongs to()
Spring tides occur().
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