电缆线路可采用埋地或架空敷设，也可以用铝电缆在地面上明设，但要防止腐蚀、水泡或机械损

天平实质是一个______杠杆．在调节天平平衡时，发现指针如图所示偏向分度盘的左侧，此时应将平衡螺母向______调．

下列对计算机发展阶段的描述中，比较全面的是( )。

A．计算机经过电子管、晶体管、集成电路、超大规模集成电路等发展阶段

B．计算机经过大型计算机、中型计算机、小型计算机、微型计算机等发展阶段

C．计算机经过大型计算机、微型计算机、网络计算机发展阶段

D．计算机经过大型主机、小型计算机、微型计算机、局域网、Internet发展阶段

航天员若在轨道舱内长时间停留，需要每天进行锻炼，在轨道舱内，下列运动最能有效锻炼肌肉的力量的是（　　）

A．上下举哑铃

B．拉弹簧拉力器

C．跳绳

D．做引体向上

Easter(复活节) is still a great day for worship, randy in baskets and running around the yard finding eggs, but every year it gets quite a bit worse for bunnies.

And no, not because the kids like to pull their ears. The culprit is climate change, and some researchers found that rising temperatures arc having harmful effects on at least five species of rabbit in the US.

Take the Lower Keys March rabbit, for instance. An endangered species that lives in the Lower Florida Keys, this species of cottontail is a great swimmer — it lives on the islands! — but it is already severely affected by development and now by rising levels. According to the Center for Biological Diversity, an ocean level rise of only 0. 6 meters will send these guys jumping to higher ground and a 0.9-meter rise would wipe out their habitat (栖息地) completely.

The snowshoe hare, on the other hand, has a color issue. Most of these rabbits change their fur color from white in the wintertime to brown in the summer, each designed to give them better cover from predators（捕食者）.  As the number of days with snow decreases all across the country, however, more and more bunnies arc being left in white fur during brown dirt days of both fall and spring, making them an easier mark for predators. Researchers know that the color change is controlled by the number of hours of sunlight, but whether the rabbit will be able to adapt quick enough to survive is a big question. The National Wildlife Federation has reported that hunters have noticed their numbers are already markedly down.

American pikas or rock rabbits, a relative of rabbits and hares, might be the firs' of these species to go extinct due to climate change. About 7-8 inches long, pikas live high in the cool, damp mountains west of the Rocky Mountains. As global temperatures rise, they would naturally migrate (迁徙) to higher ground — but they already occupy the mountaintops. They can't go any higher. The National Wildlife Federation reports that they might not be able to stand the new temperatures as their habitat beats up.

The volcano rabbit has the same problem. These rabbits live on the slopes of volcanoes in Mexico, and recent studies have shown that the lower range of their habitat has already shifted upward about 700 meters, but there are not suitable plants for them to move higher, so they are stuck in the middle. Scientists are concerned about their populations.

Native to the US, pygmy rabbits weigh less than 1 pound and live in the American West. They are believed to be the smallest rabbits in the world. Their habitats have been destroyed by development. Several populations, such as the Columbia Basin pygmy, almost went extinct and were saved by zoo breeding programs. Pygmy rabbits also rely on winter cover by digging tunnels through the snow to escape predators, but lesser snowfall is leaving them exposed.

All of this gives new meaning to dressing up in a giant bunny costume this Easter.

小题1:The writer mentions Easter at the beginning of the passage in order to_______.

A．show the importance of Easter Day

B．introduce the issue about bunnies

C．remind people of Easter traditions

D．discuss the relationship between Easter and bunnies小题2:The word "culprit" ( Paragraph 2) is closest in meaning to______.

A．criminal

B．judge

C．victim

D．producer小题3:According to the passage, some rabbits can now be easily Uncovered by predators because they_______

A．are exposed lo more skillful hunters

B．have moved to habitats with fewer plants

C．haven't adapted themselves to climate change

D．can't change their fur color into white in the fall and the spring小题4:The problem faced by volcano rabbets and rock rabbits is that________.

A．both are affected by 1ess snow

B．both are affected by rising sea levels

C．neither can find enough food

D．neither can migrate to higher places小题5:Which best describes the writer's tone in the postage?

A．Approving.

B．Concerned.

C．Enthusiastic.

D．Doubtful.

药典规定颗粒剂粒度检查不能通过1号筛和能通过5号筛的颗粒剂和粉末总和不得超过

A．5%

B．8%

C．10%

D．15%

E．20%