What's the difference between "or" and "and" in mathematics? Both can be used, and both are necessary.
What's the difference between 1 time and 2 times in mathematics? It is impossible to judge the exact meaning only by saying 1 time and twice. The accurate description method should be "double" and "double", which have the same meaning.
Is there a difference between "profit" and "profit rate" in mathematics? Profit: the balance of income from selling products after deducting costs, prices and taxes. Under different social conditions, the connotation of profit is different, and social relations are also different. Calculation formula: profit = business+net investment income+net non-business income and expenditure profit rate: profit rate is the ratio of surplus value to all prepaid capital, and profit rate is the conversion form of surplus value rate, which is another ratio calculated by different methods for the same surplus value. If P' stands for profit rate and c stands for all prepaid capital (c+v), then profit rate P'= M/C = M/(C+V). Profit rate is a relative index reflecting the profit level of an enterprise in a certain period. Profit rate index can not only assess the completion of enterprise profit plan, but also compare the management level between enterprises and in different periods to improve economic benefits.
What is the difference between evaporation and vaporization in chemistry? Evaporation means evaporation, dehydration and evaporation means evaporation.
evaporate
Evaporation, disappearance, dehydration and drying
Disconnect the evaporation control system.
Disconnect the evaporation control system.
Usage example
1. Be careful not to evaporate too much liquid.
Be careful not to lose too much water due to evaporation.
2. When the rainfall exceeds the evaporation, the dissolved or suspended substances in the soil move laterally or downwards.
Leaching is the lateral or downward movement of dissolved or suspended substances in soil when rainfall exceeds evaporation.
3. Heating makes the molecules of the substance move faster, thus increasing the evaporation speed.
Heating makes the molecules of matter move faster, and as a result, the speed of evaporation is accelerated.
4. Instrument for measuring the evaporation rate of water.
An instrument for measuring the evaporation rate of water.
5. The first step of paint drying and curing is the evaporation of solvent.
The first step of paint drying and repairing is the evaporation of grease solvent.
Synonym vaporization
evaporate
The heat of condensation equals the heat of vaporization.
The heat of condensation equals the heat of vaporization.
The evaporation rate varies with the design of the container and the volume of the stored product.
The evaporation rate varies with the design of the container and the volume of the stored product.
evaporate
The oil is heated and partially vaporized.
After heating, the crude oil is partially vaporized.
In this case, filling may lead to excessive evaporation of the feed.
In this case, charging may cause additional charging vaporization.
What is the legal difference between a law and a lawyer? You mean the specialized courses in the university? The study contents of law and lawyers are basically the same, except that some courses of lawyers focus on practice, and law only studies the laws of various departments. There is not much difference.
What is the difference between "root" and "solution" in high school mathematics? Generally speaking, there is no difference between the solution and the root of an unary equation. Binary and above answers are collectively called solutions, and roots refer to a solution, that is to say, this solution contains all roots.
What is the difference between session and s method in thinkphp? The difference between the two is big.
Session is used in combination with local cookie, which are generally used for login or verification code. Of course, you can also temporarily store some variables, but the number cannot be too large.
S is cached in tp. This cache is only on the server, and it is often used in some places that are not suitable for frequent calls. For example, when developing WeChat, aess_token is obtained, and there is a strict limit on the number of calls, so the cache can play a very important role at this time. Just read the cache directly when using it, and it also greatly improves the response speed.