露地蔬菜如何灌溉？

Tail Spin

Two dolphins race around in a big pool in the Ocean Park. The smaller dolphin, Grace, shows off a few of her tricks, turning around and waving hello to the crowd. The most amazing thing about her, however, is that she's even swimming at all. She doesn't have a tail.

Grace lost her tail as a baby when she got caught up in a fish trap. When the dolphin arrived at the Ocean Park in December 2005, she was fighting for her life. “ Is she going to make it？” Her trainer, Abbey Stone, feared the worst. Grace did make it—but her tail didn't. She ended up losing her flukes and the lower part of her peduncle.

Over the past six years, she has learned to swim without her tail. Dolphins swim by moving their flukes and peduncle up and down. Grace taught herself to move another way—like a fish! She pushes herself forward through the water by moving her peduncle from side to side.

The movements put harmful pressure on Grace's backbone. So a company offered to create a man­made tail for her. The tail had to be strong enough to stay on Grace as she swam but soft enough that it wouldn't hurt her.

The first time Grace wore the artificial tail, she soon shook it off and let it sink to the bottom of the pool. Now, she is still learning to use the tail. Some days she wears it for an hour at a time, others not at all. “The new tail isn't necessary for her to feel comfortable，” says Stone, “but it helps to keep that range of motion (动作) and build muscles (肌肉)．”

Now, the dolphin is about to get an even happier ending. This month, Grace will star in Dolphin Tale, a film that focuses on her rescue and recovery. Her progress has inspired more than just a new movie. Many people travel from near and far to meet her. Seeing Grace swim with her man­made tail gives people so much courage.

小题1:When Grace first arrived at the Ocean Park, her trainer worried about her ________.

A．physical build

B．potential ability

C．chance of survival

D．adaptation to the surroundings小题2:A man­made tail is created for Grace to ________.

A．let her recover faster

B．make her comfortable

C．adjust her way of swimming

D．help her perform better tricks小题3:The story of Grace inspires people to ________.

A．stick to their dreams

B．treat animals friendly

C．treasure what they have

D．face difficulties bravely

近年来.某地按照“意见收集、公开听证、民主决策、执行督办、群众评议”的原则创新社区民主管理办法，让社区居民对社区事务进行全方位、全过程的参与、监督。社区居民提出合理化建议5200余条，近千名居民代表直接参与了社区重大民生事项的决策。该社区民主管理办法（）。

①扩大了社区居民对社区事务的决策参与范围

②创新了社区居民自治组织的组织体系

③突显了社区居民在自我管理中的主体地位

④消除了社区居民消极参与社区管理的现象

A.①②

B.①③

C.②④

D.③④

处于封建制度下的中国是一个奉行______的社会。北京四合院形象地体现了儒家的______。P60－61

( )墙柱面做软包装饰时，在基面板上用填充材料、面层材料覆盖，最好的固定方法是粘接。

患者男，50岁。入院时面容憔悴，面色灰白，表情淡漠，眼眶凹陷，目光无神，对疾病治疗失去信心，有轻生的念头。

经测量该老人的血压18.7/13.3kPa（140/100mmHg），属于（）

A.正常血压

B.正常高值

C.临界高血压

D.1级高血压

E.2级高血压