更多“As an industry, biotechnology stands to _______ electronics in dollar volume and pe ”相关问题
  • 第1题:

    下列运算符重载函数的原型错误的是( )。

    A.Volume operator-(double,double);

    B.double Volume::operator-(double);

    C.Volume Volume::operator-(Volume);

    D.Volume operator-(Volume,Volume);


    正确答案:A
    解析:运算符重载也是一种函数重载。函数重载要求编译器能够唯一地确定调用一个函数时应该执行哪个函数代码,即采用哪个函数实现。确定函数实现时,要求从函数参数的个数和类型上来区分。也就是说,进行函数重载时,要求同名函数在参数个数上不同,或者参数类型上不同。否则,无法实现重载。选项A重载的减号运算符与C++默认提供的两个double相减运算无法区别。

  • 第2题:

    共用题干
    第三篇

    The Science of the Future

    Until recently,the"science of the future"was supposed to be electronics and
    artificial intelligence.Today it seems more and more likely that the next great
    breakthroughs in technology will be brought through a combination of those two sciences
    with organic chemistry and genetic engineering.This combination is the science of
    biotechnology.
    Organic chemistry enables us to produce marvelous synthetic(合成的)materials.
    However,it is still difficult to manufacture anything that has the capacity of wool to conserve
    heat and also to absorb moisture.Nothing that we have been able to produce so far comes
    anywhere near the combination of strength,lightness and flexibility that we find in the bodies
    of ordinary insects.
    Nevertheless,scientists in the laboratory have already succeeded in"growing"a
    material that has many of the characteristics of human skin.The next step may well be
    "biotech hearts and eyes"which can replace diseased organs in human beings.These will
    not be rejected by the body,as is the case with organs from humans.
    The application of biotechnology to energy production seems even more promising.In
    1 996 the famous science-fiction writer,Arthur C. Clarke,many of whose previous
    predictions have come true,said that we may soon be able to develop remarkably cheap
    and renewable sources of energy.Some of these power sources will be biological.Clarke
    and others have warned us repeatedly that sooner or later we will have to give up our
    dependence on non-renewable power sources.Coal,oil and gas are indeed convenient.
    However,using them also means creating dangerously high levels of pollution.It will be
    impossible to meet the growing demand for energy without increasing that pollution to
    catastrophic(灾难性的)levels unless we develop power sources that are both cheaper and
    cleaner.
    It is attempting to think that biotechnology or some other"science of the future"can
    solve our problems.Before we surrender to that temptation we should remember nuclear
    power.Only a few generations ago it seemed to promise limitless,cheap and safe energy.
    Today those promises lie buried in a concrete grave in a place called Chernobyl,in the
    Ukraine.Biotechnology is unlikely,however,to break its promises in quite the same or
    such a dangerous way.

    According to the passage,the science of the future is likely to be
    A:electronics.
    B:biotechnology.
    C:genetic engineering.
    D:nuclear technology.

    答案:B
    解析:

  • 第3题:

    在下面的运算符重载函数的原型中,错误的是:

    A.volume operator-(double,double);

    B.double volume::operator-(double);

    C.volume volume ::operator-(volume);

    D.volume operator-(volume,volume);


    Volume operator - (double, double);

  • 第4题:

    在下面的运算符重载函数的原型中,错误的是( )。

    A.Volume operator-(double,double);

    B.double Volume::operator-(double);

    C.Volume Volume::operator-(Volume);

    D.Volume operator-(Volume,Volume);


    正确答案:A

  • 第5题:

    哪一组的两个尾部划线部分发音相同?

    A.breaths--breathes

    B.baths--bathes

    C.robs--legs

    D.stands--chefs


    rob s --leg s

  • 第6题:

    假定BOX为一个类,volume()为该类公有的函数成员,x为该类的一个对象,则访问x对象中函数成员volume ()的格式为()。

    A.x.volume ()

    B.x. volume

    C.x-> volume

    D.x-> volume ()


    x. volume ()