与图像文件体积无关的因素是（）。 A.图像尺寸 B.颜色数量 C.表现内容 D.压缩

请根据题目要求，在四个选项中选出一个最恰当的答案。

尽管黄金的地位已今不如昔，但魔力依然不减。纸币在通货膨胀面前无能为力，而黄金天生具备保值功能，在通货膨胀时代尤为耀眼。美元和黄金价格犹如跷跷板的两端，在美元持续贬值的背景下，黄金价格会自然走高。在股市风险加大时，黄金市场会成为资金的避风港，最近国际市场金价走高，和美国次贷危机引发的股市震荡不无关系。

对这段文字的主旨概括最准确的是：

A．预测黄金市场未来的走势

B．解释黄金受到追捧的原因

C．说明影响金价的各种因素

D．分析黄金投资的国际环境

个人投资者A想将自己一笔数额为3000元的闲置资金短期投资于金融市场。现知A厌恶风险，对收益并无特别要求，则A最适合投资于（）。

A.股票市场

B.商业票据市场

C.货币市场基金

D.大额可转让定期存单市场

对支气管平滑肌上的β2受体具有选择性兴奋作用的药物是

A．特布他林

B．肾上腺素

C．异丙肾上腺素

D．多巴胺

E．氨茶碱

My father got his first job at eleven years old. cleaning up the garbage outside of the bowlingalley（保龄球场）． Two years later his dad died. and my fatber worked odd jobs to help put food onthe table during the Depression. Ten years after that. Dad fell in love. married Mom and had ababy girl. Eight more children followed. During those years, Dad slipped into a routine he neverbroke He woke up before six. took the train to work and wouldn't get home until after five thirly.After supper, Dad spent the rest of the evening in the basement making dental parts for extra    

Two years ago, at the age of sixty-four, Dad retired. When I was young, Mom and Dad did well to hide the fact that we were poor. All nine of us attended Catholic schools and we always had plenty of school supplies. We slept in wooden beds, shared one bathroom and watched television from a tiny black-and-white set in the living room. Mom and Dad never bought anything for themselves. They clipped coupons, wore the same pair of sneakers for twenty years and sewed wom clothing together every Saturday afternoon.

At his retirement party. I wanted to thank Dad for all his hard work and sacrifice by buying him the best present I could think of. As I shopped though. l realized there was nothing I could buy for Dad. Dad taught me through his own faith that the greatest gifis come from the heart Finally. I left my present on the kitchen table for Dad to find before he Ieft for his frnal day at work.

小题1:How did Dad get extra money besides his daytime routine work?

A．Collecting garbage outside the alley.

B．Making dental parts in the basement.

C．Putting food on the table in a hotel.

D．Working oddjobs on the train.小题2:What does Paragraph 2 mainly talk about?

A．Dad retired after sixty-four years of hard work.

B．Dad and Mom could afford their children good education.

C．Parents made every effort to save for chcir children

D．The family was once poor but became well off later.小题3:After reading the text. what would be the author's present for his Dad?

A．A big-screen television.

B．A vacation schedule.

C．A letter of grateful words.

D．A great retirement party.小题4:What can be the best title for the text?

A．Thank You. Dad.

B．Dad's Expenence.

C．A Hardworking Dad.

D．Dad. a Breadwinner.

蛤粉炒时，每100kg药物用蛤粉的量是（）

A.20～25kg

B.30～50kg

C.55～65kg

D.80kg

E.以能掩盖药物为度