以下哪项检查对嗜铬细胞瘤诊断有较大意义（） A.尿17-羟类固醇测定 B.腹膜后

关于下列的说法正确的是（   ）

A．分子由原子构成，所以分子比原子大 　

B．原子中的原子核一定含有中子

C．原子的最外层电子数跟该原子对应的元素的化学性质关系密切

D．中子和质子是最小的粒子

患者男性，60岁。18时聚餐，饮39度白酒约250ml（平时可饮同类酒400ml而不醉)，半小时后出现阵发性腹痛，伴恶心，于20时来院急诊。有高血压病史8年，平时服心痛定10mg，每日三次，血压波动在20～24／12～13.3kPa。平时无胸闷及心绞痛。体检：体温36.8℃，脉搏90次／分，呼吸22次／分，血压20／10kPa。心律齐，肺听诊无异常，腹软，剑突下压痛（士)，无腹肌紧张，四肢活动正常。急诊时的诊断应考虑哪些急性病？

A．急性胃炎、急性胆囊炎、急性胰腺炎 

B．心绞痛、高血压病、脑血管意外 

C．急性心肌梗塞、急性酒精中毒 

D．也急性胃肠炎、胃穿孔

Owning a smartphone may not be as smart as you think. They may let you surf the Internet, listen to music and take photos wherever you are, but they also turn you into a workaholic（工作狂）.

A study suggests that, by giving you access to emails at all times, the smartphone adds as much as two hours to your working day. Researchers found that Britons work an additional 460 hours a year on average as they are able to respond to emails on their mobiles. The study shows the average UK working day is between 9 and 10 hours, but a further 2 hours is spent responding to or sending work emails, or making work calls.

Almost one in ten admits spending up to three hours outside their normal working day checking work emails. Some workers say they are on call almost 24 hours a day. Nearly two-thirds say they often check work emails just before they go to bed and as soon as they wake up, while over a third have replied to one in the middle of the night. The average time for first checking emails is between 6 am and 7 am, with more than a third checking their first email in this period, and a quarter checking them between 11pm and midnight.

Ghadi Hobeika, marketing director of Pixmania, said: “The ability to access millions of applications has made smartphones invaluable for many people. However, there are disadvantages. Many companies expect their employees to be on call 24 hours a day, seven days a week, and smartphones mean that people cannot get away from work. The more constantly in touch we become, the more is expected of us in work . ”

小题1:With a smartphone the average UK working day is _______.

A．2 hours

B．9 to 10 hours

C．11 to 12 hours

D．24 hours小题2:It could be inferred from the text that the British people _______.

A．prefer to check emails in the morning

B．are crazy about different smartphones

C．shorten their normal working hours

D．work extra hours with smartphones小题3:What does Ghadi Hobeika feel about smartphones?

A．They are unimportant for most of people.

B．They have disadvantages for some companies.

C．They make it impossible for people to rest.

D．They are useful to improve a work ability.小题4:Where can we most probably read this text?

A．In a science fiction.

B．In a newspaper.

C．In a travel magazine.

D．In a storybook.

简述邮政企业实行资金集中管理的内容。

（）是要求被担保人向担保人提供一份担保。

A.保证

B.抵押

C.质押

D.反担保