最早记载黄疸有传染性的是 A．《金匮要略》 B．《景岳全书》 C．《卫生宝鉴》 D．

Electronic waste, or e-waste, refers to electronic products that are no longer usable. This can include TVs, cell phones and computers and other office electronics, electronic toys and videos machines. Today, the average turnover（更换）rate for a computer in the United States is every two years, according to the environmental group, Greenpeace.

The group's Dai Yun says e-waste is a global problem. "The electronic industry is one of the fastest growing industries in the world. The high speed of growth in this industry means more and more electronic products are being wasted and thrown away. If no one decides to retrieve the old products and process them properly, the electronic waste will sweep over the earth like the huge wave behind me and pollute the Earth seriously."

Greenpeace works out that 20 to 50 million tons of e-waste are produced globally each year. The components（部件）in many electronic products contain harmful chemicals that pollute ground water and the environment.

At present , the U.S. has no federal law for the disposal (处理) of e-waste although a few states have e-waste recycling programs in place, but there is no law. The U.S. exports much of its e-waste to third world countries, such as India and China, where workers took apart computers for valuable parts, hoping to sell them for money. But harmful wastes expert, Dr. Bakul Rao, says that's a dangerous practice. "From now on, the recyclers are not very educated. All they know is they can retrieve copper or gold out of it. So, the easiest way to do that is leach (过滤) it out in an acid or burn it off to retrieve it. So, that's where they don't know how to deal with it, neither do they have any health systems in place. So, their exposure is more."

小题1:Which of the following is most likely not to be a form of e-waste?

A．A mobile phone

B．A radio

C．An e-bike

D．A table小题2:What does the underlined word "retrieve" (paragraph 2) probably mean?

A．look into

B．take apart

C．get back

D．throw away小题3:What of the following statements is true according to the passage？

A．The U.S. has strict national laws for dealing with e-waste.

B．Third world countries import e-waste to get valuable parts, which is a safe and easy way to

make money.

C．The way uneducated workers deal with old computers does great harm to the environment as well as to their own health.

D．More and more electronic waste is being wasted and thrown away mainly because ofpeople's bad habits.

小题4:What is the purpose of writing the passage?

A．To attract more people's attention to e-waste.

B．To call on people not to throw away e-waste anywhere.

C．To tell people what e-waste is and how to deal with it well.

D．To warn people to break away from the electronic industry.小题5: The next paragraph probably concerns_______.

A．how to deal with e-waste properly

B．how to protect ourselves from harm by e-waste

C．How to slow down the development in the electronic industry

D．how to make full use of e-waste

适用于空气和表面灭菌方法的是（）

A.通入无菌空气

B.过滤灭菌

C.紫外线灭菌

D.化学试剂搽试

E.辐射灭菌

补水装置对系统进行加液操作正确的是（）

A.补液前拧松自动排气阀（V301~V302）的红色放气螺帽，使排气阀能自动排气，在正常使用时也需保持自动排气阀红色螺帽处于拧松状态主循环管路球阀（V001-V002）应开启

B.补液前拧松手动排气阀（V303~V305）的白色放气螺帽，以便在加液时系统内气体顺利排出

C.调节三通阀（V201）阀位至开限位

D.在初次补液前，需检查膨胀罐底部气压表，应保持在预充压力值1.2bar.若压力损失下降，应通过电控系统手动开启补气泵（泵体带电源开关：按下0为关，按下1为开）补至静止气压1.2bar，才能进行补液

在耐热钢中加入较多的镍，能使钢（），以提高钢的（）能力。

计算题：有一台卧式容器底座托板，内弯曲半径R=1500mm，板厚t=20mm，其角度α=110°，求一块板的净料长度是多少？