问题 单项选择题

在窗体上画一个命令按钮,然后编写下列程序:  Private Sub Command1 click( )    Dim a As Single,b As Single    a=6:b=2    RC a,b    Print a,b  End Sub  Sub RC(x As Single,y As Single)    i=x    x=i/y    y=i Mod y  End Sub 程序运行后,输出的结果为()。

A.如果选项组结合到某个字段,则只有组框架本身结合到该字段,而不是组框架的复选框、选项按钮或切换按钮

B.选项组可以设置为表达式或非结合选项组,也可以在自定义对话框中使用非结合选项组来接受用户的输入,但不能根 据输入的内容来执行相应的操作

C.选项组是由一个组框、一个复选框、选项按钮或切换按钮和关闭按钮组成的

D.以上说法均错

答案

参考答案:A

解析:blooean isAhve( )可以判断线程是否处于活动状态,即调用了start( )但 run( )还未返回,Thread currentThread( )可以返回当前线程对象的引用,String getName( )可 以取得设置的线程的名字,static boolean interrupted( )可以判断当前线程是否被中断。

选择题
单项选择题

For more than a decade, the prevailing view of innovation has been that little guys had the edge. Innovation bubbled up from the bottom, from upstarts and insurgents. Big companies didn’t innovate, and government got in the way. In the dominant innovation narrative, venture-backed start-up companies were cast as the nimble winners and large corporations as the sluggish losers.

There was a rich vein of business-school research supporting the notion that innovation comes most naturally from small-scale outsiders. That was the headline point that a generation of business people, venture investors and policy makers took away from Clayton M. Christensen’s 1997 classic, The Innovator’s Dilemma, which examined the process of disruptive change.

But a shift in thinking is under way, driven by altered circumstances. In the United States and abroad, the biggest economic and social challenges—and potential business opportunities—are problems in multifaceted fields like the environment, energy and health care that rely on complex systems.

Solutions won’t come from the next new gadget or clever software, though such innovations will help. Instead, they must plug into a larger network of change shaped by economics, regulation and policy. Progress, experts say, will depend on people in a wide range of disciplines, and collaboration across the public and private sectors.

"These days, more than ever, size matters in the innovation game," said John Kao, a former professor at the Harvard business school and an innovation consultant to governments and corporations. In its economic recovery package, the Obama administration is financing programs to generate innovation with technology in health care and energy. The government will spend billions to accelerate the adoption of electronic patient records to help improve care and curb costs, and billions more to spur the installation of so-called smart grids that use sensors and computerized meters to reduce electricity consumption.

In other developed nations, where energy costs are higher than in the United States, government and corporate projects to cut fuel use and reduce carbon emissions are further along. But the Obama administration is pushing environmental and energy conservation policy more in the direction of Europe and Japan. The change will bolster demand for more efficient and more environmentally friendly systems for managing commuter traffic, food distribution, electric grids and waterways.

These systems are animated by inexpensive sensors and ever-increasing computing power but also require the skills to analyze, model and optimize complex networks, factoring in things as diverse as weather patterns and human behavior. Big companies like General Electric and IBM that employ scientists in many disciplines typically have the skills and scale to tackle such projects.

Big companies have the advantage of()

A. making Complex networks work in a coordinated way

B. reducing the cost by producing things in large quantities

C. being able to integrate innovations across complex systems

D. controlling human behavior with imposed restraints on creativity