通常把空气中水蒸汽分压力对应的饱和温度叫（）。

下列有关命题的说法正确的是（　　）

①|x|≠3⇒x≠3或x≠-3；

②命题“a、b都是偶数，则a+b是偶数”的逆否命题是“a+b不是偶数，则a、b都不是偶数”；   

③“|x-1|＜2”是“x＜3”的充分不必要条件

④若一个命题的否命题为真，则它的逆命题一定是真．

A．①④

B．②③

C．②④

D．③④

如图所示，符合安全用电要求的是（　　）

A．试电笔的握法

B．电路中灯泡与开关的连接

C．电器外壳未接地

D．多个大功率用电器同时使用一个插座

如果你是从事运动鞋生产的，你的企业使命应表述为（）

A．为顾客提供最大的价值。

B．生产为大众消费需求的脚上用品。

C．以顾客行走舒适为己任。

D．提供制造足以可以和汽车比美的鞋子。

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.

（70）（）

A.other

B.simplify

C.complex

D.critical