以下哪些机构应当集中安排残疾人就业（）。A.政府和社会依法兴办的残疾人福利企业、盲人

Which came first, the chicken or the egg? This is one of life’s __1__ questions and people have been debating about it for thousands of years. Now scientists believe they have solved this _2__. Researchers from Sheffield and Warwick Universities in England discovered the answer __3__. They used a super computer to observe the shell-making process while a new shell was __4__. Then they found one protein called OC17 that is __5__ for forming eggshell. This is only found inside a chicken’s body, which is proof that the _6__ came first. The team was __7__ looking at how animals and birds make eggshells but suddenly made their surprising __8__. The big question now is where chickens came from. The _9__ is from dinosaurs.
The research team said eggshells are one of nature’s most __10__ creations. Professor John Harding from the team told reporters: “Understanding how chickens make eggshells is fascinating in itself, but it can also be __11__ in designing new materials.” Eggshells are very lightweight but incredibly strong. Even the most up-to-date materials __12__ by the world’s top engineers can not produce anything as __13__ as an eggshell. Professor Harding added that __14__ eggshells could help to cure bone diseases and design materials for the construction industry.“Nature has found wonderful ways that __15__ for all kinds of problems in materials science and technology — we can learn a lot from them.” he said.

小题1:	A．strangest B．best C．oldest D．longest

小题2:	A．puzzle B．story C．history D．idea

小题3:	A．on purpose B．by chance C．without hesitation D．at work

小题4:	A．breaking B．changing C．disappearing D．forming

小题5:	A．necessary B．easy C．kind D．impossible

小题6:	A．egg B．eggshell C．chicken D．dinosaur

小题7:	A．obviously B．originally C．thoughtfully D．surprisingly

小题8:	A．invention B．mistake C．statement D．discovery

小题9:	A．answer B．research C．key D．egg

小题10:

A．strange B．ridiculous C．funny D．amazing

小题11:

A．hopeful B．helpful C．respectful D．colorful

小题12:

A．bought B．cut C．designed D．carried

小题13:

A．brilliant B．ordinary C．1ight D．strong

小题14:

A．finding B．watching C．studying D．making

小题15:

A．happen B．work C．wait D．look