催化剂中毒类型可分为暂时中毒和（）。A、永久中毒B、暂时失效C_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

催化剂中毒类型可分为暂时中毒和（）。

A、永久中毒

B、暂时失效

C、失活

答案

参考答案：A

多项选择题

青年女患者，突发头痛、呕吐，脑膜刺激征（+），腰穿血性脑脊液，CT显示顶叶高密度灶。应考虑的可能诊断是（）

A.脑叶出血

B.蛛网膜下腔出血（原发性）

C.蛛网膜下腔出血（继发性）

D.颅内动脉瘤

E.脑血管畸形

填空题

Part 4

Questions 26-45

·Read the following passage and choose the best word for each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.
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．and ask

B．ask

C．asking

D．asked