大学英语四级满分为710分，其中写作部分占106.5分，听力部分占248.5分，阅读理解部分占248.5分，翻译部分占106.5分。
When we define our interfaces in C# 4.0, we are allowed to mark each of the generic parameters as in or out. If we try to set a generic parameter as out and that\'d lead to a problem, the compiler rai
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