【单选题】某合同中的价格条款规定如下:“每箱FOB大连25美元,总值7500美元”。则此时美元为( )。
【判断题】VR是Virtual Reality的英文缩写,即虚拟现实,也被译为灵境或幻真。
【单选题】下列说法不正确的是( )。
A.
人通过视觉可以从外部世界获取80%左右的信息,通过听觉可以获取 10%左右的信息,通过触觉、嗅觉和味觉可以从外部获取的信息量约10%。
B.
多媒体应用系统开发的过程大致是:概念阶段、设计阶段、素材制作阶段、集成阶段、测试阶段、发行阶段。
C.
多媒体是一个比较综合的概念,即使没有计算机也可以实现和运用多媒体技术。
D.
虚拟现实VR(Virtual Reality)技术,是在许多相关技术(如仿真技术、计算机图形学、多媒体技术等)的基础上发展起来的一门综合技术,是多媒体发展的更高境界。
【单选题】真核细胞与原核细胞最本质的区别在于( )
【单选题】—It is _______he often fails in exams_______ makes his parents worried about him. —So, he has to work whole-heartedly.
【单选题】------ It is he often fails in the exams makes his parents worried about him. ------ So, he has to work whole- heartedly.
【单选题】It is ______he often fails in exams ______makes his parents worried about him.
【单选题】It is ______ he often breaks the school rules ______ makes his headteacher unsatisfied with him.
【单选题】Tom often makes his brother _______ but yesterday he was made _______ by his brother. [ ]
【单选题】Tony often makes his sister _______, but this time he was made ______by his sister.