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Water is the “life blood” of our earth. It is in every living thing. It is in the air. It runs through mountains and valleys. It forms lakes and oceans. Water is everywhere. Nature has a great water system. Rain water finds its way to streams and rivers. Rivers lead to the ocean. At the mouths of the rivers, fresh water joins the salt water of the ocean. Here at the mouth of a river there is much important plant and animal life. Pollution destroys this life, however. We have to clean our streams and rivers. Man has to work with nature-not against it.
We can come to the ( ) that the more we practice, the more skillful we will be.
We can infer from the passage that the water table lies .
The fresh water generator produces fresh water ().
What is the most usual reason for the fresh water-sea water heat exchanger fouling in the sea side?
You should not divide the fresh water()three trips.
Fresh water is used for the cooling of cylinder jackets and () of the marine diesel engine.
Prior to getting underway in fresh or brackish water,the Master must().
In a domestic fresh water system, the pump starters are controlled by () switches which operate when the pressure in the tank varies within predetermined limits as water is drawn off.
Welcome to the 247 weather broadcast from the international service provider. This week will begin with snow and it ends on Tuesday. And it will be cloudy all. We will have some sunshine by the end of this week. 2. What will the weather be like at the weekend?
According to the passage, we can predict that the number of family with a single child will 回答 (将会增长)
The disadvantages of rail compared with motor carrier are()
The food we are going to have is home-cooked with fresh _________.
When the density of water is 1000,i.e.in fresh water and in summer zone a ship may load to the upper edge of the line marked().
The motor for the fresh water pump ().
As for turbine oil, contact with water in the form of steam will be inevitable so good () properties will be essential.
As for turbine oil, contacting with water in the form of steam will be inevitable so good () properties will be essential.
The main engine is cooled with fresh water ()is added suitable small quantities of chemicals to prevent corrosion.
When a vacuum boiling evaporator works, the hot jacket water will pass over the tube stack and () the sea water passing through the tubes.
The pilot motor launches are () blue,with the PILOT in white.
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