下列变形中，正确的是（ ） A．若ac=bc，那么a=b B．若a=b，那么ac=b

以下关于氟斑牙的描述哪项错误（）

A.牙面呈黄白相间的花斑

B.可有釉质缺损

C.对酸敏感

D.病变见于同时期发育的一组牙上

E.询问患者幼年时的居住地有助于诊断

期货公司设立合规审查部门的目的是为了对期货公司经营管理行为的合法合规性进行审查、稽核。（）

I bent down in the shade under a sixty-foot-tall cactus（仙人掌）, waiting for them to appear. The time was eight thirty in the morning. For seven mornings I had come to the same distant spot in the Sonoran Desert, in southern Arizona. I was here to watch the roadrunner, a small fast-running bird.

I spotted two birds under a bush with red flowers. The roadrunners rushed out from under it. The birds moved rapidly on long skinny legs. Their feathers were brown and black. Their tails were seven inches long. Roadrunners use the tail for balance when running.

That day, the roadrunners performed a courtship（求婚）dance. They ran in wild circles. Suddenly, one stopped and stood still, its round eyes full of light. The second bird took hold of a small stick off the ground and presented it to the first, a gift serving as a symbol of their partnership.

I returned to the spot each day, leaving bits of boiled chicken hoping they would return. Roadrunners eat snakes, lizards, mice, beetles, and spiders. Food is in short supply in the desert, so my offerings were welcome. The pair grew used to me.

Soon after the pair finished building their nest six white eggs appeared in the nest bowl. In about three weeks, six roadrunner chicks, skin as black as coal, cried for food. Their parents brought food such as fence lizards and stink bugs. They fed their young until they were a month and a half old.

Early one morning, a coyote（丛林狼）came around, nose to the ground, for fresh bird meat. The roadrunners fearlessly drove the coyote away, but it was soon back. After three attacks the coyote went away for good, tail between its legs.

I stopped watching the nest when the little roadrunners, at two months of age, were ready to live on their own. It was hard to break away from “my roadrunner family.” Whenever I see a roadrunner now, rushing over the ground, I say hello to it as an old friend.

小题1:The author went to the Sonoran Desert to       .

A．go on a tour of the desert

B．carry out research into some animals in the desert

C．make an observation about a kind of bird

D．enjoy an adventure in southern Arizona小题2:What can we learn about roadrunners from the text?

A．They have short tails and legs.

B．They move at a fast pace.

C．Their feathers are red and brown.

D．They don’t like boiled chicken.小题3:We can learn from the last but one paragraph that the roadrunners were        .

A．brave

B．clever

C．easily-frightened

D．lazy小题4:Which of the following would be the best title for the text?

A．How do roadrunners seek a partner?

B．My close friendship with roadrunners.

C．Roadrunner family in the Sonoran Desert.

D．How did I find roadrunners in Arizona?

流行性腮腺炎流行期应尽早开展疫区内易感者的腮腺炎疫苗应急接种。

离婚案件审理程序，由于离婚案件的特殊性，乃民事诉讼中特殊规定比较多的程序，这些特殊规定包括：（）

A.判决不准离婚和调解和好的离婚案件，没有新情况、新理由，被告在6个月内又起诉的，不予受理

B.调解和好的离婚案件，可以不制作调解书

C.一审判决不准离婚的案件，上诉后，第二审人民法院认为应当判决离婚的，可以根据当事人自愿的原则，与子女抚养、财产问题一并调解，调解不成的，发回重审

D.当事人对已生效的解除婚姻关系的判决，不得申请再审