有A、B、C三种饱和醇的混合物，分为两等份：一份跟足量金属反应， * * 生a mol H₂；另一份完全燃烧后生成2a mol CO₂。则该混合醇中不可能含有

A．甲醇  B．乙醇  C．乙二醇       D．丙三醇

UML-based tools are often used for J2EE/.NET application analysis and design, both because UML’s object orientation is ideal for the J2EE/.NET implementation (66) and because of the expanding scope and complexity of today’s enterprise endeavors. (67) the approaches diverge at the coding/implementation phase, a common set of analysis and design techniques applies to both J2EE and.NET.
The use of a virtual machine (VM) architecture is also common to J2EE and .NET. Application development tools (68) intermediate-level code instead of platform-specific binary code, which means the VM interprets that code in real time or performs Just-In-Time (JIT) compilation; the Microsoft VM always runs JIT-compiled code. This VM-based model results in (69) -independent applications and is conducive to the late-binding technique that’s (70) to the OO approach.

A．platform

B．framework

C．operation

D．computer