国产毛片高清一级国语久久

A. Import a picture map, place it parallel to the surface to be mapped, then explode, absorb the picture material, and fill it on the curved surface.黎水低声问道：林大哥，这样真的能成？林聪抓紧手中的灌木根部，小声回道：能成。陈启略微有些惊讶，税后五百万，那实际上等于付出六百万购买了。Code as above; You can see, There are obvious shortcomings, For example, when I click on an element, I need to create a div. I click on the second element to create a div again, We frequently click on such and such elements, and they will frequently create div elements. Although we can remove pop-up codes when we click Close, it is not good for us to frequently create and delete them, especially for performance, and frequent operations on DOM will cause redrawing, etc., thus affecting performance. Therefore, this is a very bad habit. We can now use the monomer mode to realize the pop-up effect. We can instantiate it only once. The following code:This class can meet the basic requirements, but if we put a class like this without thread safety protection into a multi-threaded environment, there will definitely be problems. How to solve them? The first thing we think of is adding the synchronized keyword to the getInstance method, as follows: