骨折后1～2周内，患者应进行的康复治疗是（）。 A.卧床休息 B.骨折上下关节的活动

下列哪个事实说明了我们的生活离不开单细胞生物？[ ]

A．米面是一日三餐的主餐

B．水果蔬菜是生活的必需品

C．酸牛奶面包大家都爱吃

D．植树造林美化了生活环境

新生儿生理性体重下降一般可下降（ ）

A．6％～9％

B．10％～15％

C．16％～20％

D．21％～25％

水银温度计插入槽中一般要经过（）min方可读数。

A、5

B、10

C、15

D、20

反恐的主要任务由公安机关与专业的反恐部队来完成对普通民众来说，不需要介入反恐工作。

VRML is a（1）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（2）（z and time） to the presentation of documents. The applications of VRML are（3）,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（4）with VRML. Furthermore, it is componentized, profiled, and extensible, which makes it possible to use X3D in very different（5），from high-end visualizations to lightweight applications.

空白（3）处应选择（）

A.broad

B.implicit

C.explicit

D.special