动物的各种行为都是动物具有的本能。[ ]

认真读题写出下面各小数。

1．南京长江大桥全长是六点七七二千米。（   ）

2．马拉松长跑比赛的赛程是四十二点一九五千米。（   ）

3．浙江杭州湾钱塘江口的涌潮是非常壮观的江潮，潮头高度达三点五米。（   ）

4．小明的身高是一点七三米。（   ）

5．学校的四层楼房高是十三点五六米。（   ）

* * 纤维腺瘤（）。

A． * * 肿胀疼痛甚至呈搏动性，患处出现有压痛的肿块，表面皮肤红热，同时可有体温升高

B．原发于大乳管内，渐移行至 * * ，起初 * * 刺痒，灼痛，接着出现湿疹样病变， * * 和乳晕的皮肤糜烂、潮湿，有时覆盖有黄褐色的鳞屑样痂皮

C． * * 胀痛呈周期性，发生于月经前期，肿块可局限于 * * 的一部分，或分散于整个 * * ，在经期后可能缩小，腋窝淋巴结不肿大

D．发生于大乳管近 * * 的膨大部分，瘤体一般较小，带蒂且有绒毛， * * 易出现血液溢液

E．常为 * * 单发肿块，好发于外上象限，质韧，边界清楚，表面光滑，易推动，月经周期对肿块大小无影响

A recent study, while showing a generally positive attitude toward science, also suggests a widespread worry that it may be “running out of control”. This idea is dangerous.

Science can be a force for evil as well as for good. Its applications can be channeled either way, depending on our decisions. The decisions we make, personally or collectively, will determine the outcomes of science. But here is a real danger. Science is advancing so fast is so strongly influenced by businesses that we are likely to believe whatever decisions we come to will make little difference. And, rather than fighting for the best possible policies, we may step back and do nothing.

Some people go even further. They say that despite the moral and legal objections （反对）, whatever is scientifically possible will be done ——somewhere, sometime. They believe that science will get out of control in the end. This belief is dangerous too, because it a fuels sense of  hopelessness and discourages them from making efforts to build a safer world.

In our interconnected world, the lack of agreement in and of the world of science can lead to the failure to control the use of science. Without a common understanding, the challenges of “controlling” science in this century will be really tough. Take human cloning for example. Despite the general agreement among scientists on its possible huge impact （影响） on traditional moral values, some countries still go ahead with the research and development of its related techniques. The outcomes are hard to predict.

Therefore, discussions on how science is applied should be extended far beyond scientific societies. Only through the united efforts of people with hope, can we be fully safe against the misuse of science and can science best serve mankind in the future.

小题1:What can we conclude from the recent study?

A．People think highly of science.

B．People hold mixed opinions about science.

C．Science is getting dangerously out of control.

D．Science is used for both good and bad purposes.小题2:According to the passage, what will happen if we hold that science is getting beyond control?

A．The development of science will hopelessly slow down.

B．Businesses will have even greater influence on science.

C．The public will lose faith in bringing about a bright future.

D．People will work more actively to put science under control.小题3:The discussion should reach beyond scientific societies because __________.

A．scientists have failed to predict the outcomes

B．the ties between different areas need strengthening

C．united efforts are necessary for the development of science

D．people need to work together to prevent the bad use of science小题4:What is the main idea of the passage?

A．Science and its applications bring us many dangers.

B．The development of science mostly lies in people’s attitudes.

C．Mankind can largely take control of science with their efforts.

D．The future of science will be influenced by the dangerous ideas.

以一定的初速度竖直向上抛出一个小球，小球上升的最大高度为h，空气阻力的大小恒为F，则从抛出到落回到抛出点的过程中，空气阻力对小球做的功为(　　)

A．0

B．－Fh

C．Fh

D．－2Fh

主轴箱的功用是支承主轴并把动力经变速机构传给主轴，使主轴带动工件按规定转速旋转，以实现（）。

A.旋转运动

B.进给运动

C.主运动

D.辅助运动