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问题 单项选择题

患者男性，50岁。3个月前发生上消化道出血，经检查，证实为食管静脉曲张，2天前再次出现呕血、黑便，来院急诊。提示该患者有乙肝病史20余年，诊断为门静脉高压。提示患者在三腔管压迫止血时，突然出现烦躁、挣扎，继而面色青紫。正确的紧急处理措施是（）。

A.气管插管

B.迅速将三腔管往胃内插入5cm

C.立即吸氧

D.迅速剪断三腔管

E.气管切开

F.吸痰

答案

参考答案：D

选择题

河虾与西红柿同时食用会使人中毒，原因是河虾中所含的+5价砷和西红柿中的维生素C反应生成一种含+3价砷的有毒的化合物．下列说法正确的是（　　）

A．上述反应中维生素C作催化剂

B．上述反应中维生素C作氧化剂

C．由于河虾中含有砷元素，所以不能食用

D．由上述信息推测，有毒的砒霜中的砷可能为+3价
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填空题

Questions


·Read the following passage and choose the best word for each space.
Do you want to send an e-mail message to the White House
Good luck.
In the past, (26) President Bush — or at least those assigned to read his mail — what was (27) your mind it was necessary only to sit down at a personal computer connected to the lnternet and (28) a note to president@ whitehouse.gov.
But this week, Tom Matzzie, an online organizer with the A.F.L.-C.I.O., discovered that (29) with the White House had become a bit more (30) . When Mr. Matzzie sent an e-mail protesting (31) a Bush administration policy, the message was bounced back With an automated reply, saying he had to send it again in a new way.
Under a system (32) on the White House Website (33) the first time last week, those who want to send a message to President Bush must now (34) as many as nine Web pages and (35) a detailed form that starts by asking whether the message sender supports White House policy (36) differs with it.
The white House says the new e-mail system is an effort to be more responsive (37) the public and offer the administration "real time" access (38) citizen comments.
Completing a message to the president also requires (39) a subject from the provided list, then entering a full name, organization, address and e-mail address. (40) the message is sent, the writer must wait for an automated response (41) his message, (42) whether the addressee intended to send the message. The message is delivered to the White House only after the person using that e-mail address (43) it.
"Over (44) , it’s a very cumbersome process," said Jakob Nielsen, an authority on Web design. "It’s probably designed deliberately to (45) on their e-mail.\

A. cut off B. see off C. dash off D. give off
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