方差分析的基本思想为（） A.组间均方大于组内均方 B.误差均方必然小于组间均方 C

某导体两端的电压为3伏，10秒内通过其横截面的电量为3库，通过的电流为          安，电流所做的功为             焦；若该导体两端的电压降为1伏时，它的电阻为          欧。

2013年夏季转会中，C•罗纳尔多、鲁尼、贝尔、苏亚雷斯四个顶级球员选择曼联、皇马、拜仁、阿森纳等四个俱乐部，其中恰有一个俱乐部没有球员选择的情况有______种．

I was laid off last month so ______ I borrowed some money in my life

A．first time

B．for the first time

C．the first time

D．by the first time

---Can you describe_______?

---Of course.

A．what the robber is like

B．how the robber is like

C．what does the robber look like

D．how the robber looks like

VRML is a (71) for 3D multimedia and shared virtual worlds on the WWW. In comparison to HTML, VRML adds the next level of interaction, structured graphics, and extra (72) (z and time) to the presentation of documents. The applications of VRML are (73) , ranging from simple business graphics to entertaining WWW page graphics, manufacturing, scientific, entertainment, and educational applications, and 3D shared virtual worlds and communities.
X3D is the name under which the development of VRML is continued. X3D is based on XML and is backwards (74) with VRML. Furthermore, it is componentized, profiled, and extensible, which makes it possible to use X3D in very different (75) , from high-end visualizations to lightweight applications.

A．inconsistent

B．independent

C．applicable

D．compatible