初产妇第一产程约需（） A.11～12小时 B.6～8小时 C.1小时 D.1～2小

病历摘要：患者男性，65岁，突发胸痛伴出冷汗3小时入院。既往有高血压、糖尿病病史。查体：BP160/100mmHg，心率65次/分，律齐，无杂音。两肺未闻及干湿性啰音。

此时的处理是（）

A.扩血管药

B.异丙肾上腺素

C.安装临时起搏器

D.抗凝治疗

E.电复律

F.补充钾盐和镁盐

President Obama: I want to welcome Vice President Xi to the Oval Office and welcome him to the United States. This is obviously a great opportunity for us to build on the U. S.-China relationship, but also an opportunity to return the extraordinary hospitality that Vice President Xi showed Vice President Biden during his recent visit to China.

As I indicated during my recent visit to APEC and the East Asia Summit, the United States is a Pacific nation. And we are very interested and very focused on continuing to strengthen our relationships, to enhance our trade and our commerce, and make sure that we are a strong and effective partner with the Asia Pacific region. And obviously, in order to do that, it is absolutely vital that we have a strong relationship with China.

So, Mr. Vice President, I hope you have a wonderful visit while you're here. I'm sure the American people welcome you. I'm glad that you're going to get an opportunity to get out of Washington. I know you'll be visiting Lowa, which you visited many years ago when you were governor. And I understand you're also going to Los Angeles and maybe even taking in (观看) a Lakers basketball game. So I hope you enjoy that very much.

I want to extend my deepest welcome to you, and look forward to a future of improved dialogue and increased cooperation in the years to come.

小题1:Where can you most probably read the passage?

A．In a science report.

B．In a news report.

C．In a guidebook.

D．In an advertisement.小题2:Which is true according to the passage?

A．Biden once paid a visit to China before this talk.

B．Obama didn't attend APEC or the East Asia Summit recently.

C．Biden and Xi Jinping are holding the talk in the Oval Office of the White House.

D．The talk is being held between China and the USA in the Oval Office of New York.小题3:From Para. 3, we can learn that Vice President Xi ____.

A．will visit New York, Washington DC and Los Angeles

B．will go to Los Angeles to watch a soccer game

C．visited Lowa many years ago, when he was governor

D．visited Lowa many years ago, when he was a vice president

下列关于比例税率的说法，错误的是( )

A．比例税率是对同一征税对象，不论数额大小，采用相同比例征税的税率形式

B．一般适用于对所得和财产的课税

C．一般认为，采用比例税率这一形式，可以使同一课税对象的不同纳税人的税收负担一致，并且计算简便，在一定程度上可以避免使用累进税率可能造成的抑制经济发展的消极作用

D．比例税率不能体现按能负担的原则，在调节纳税人的收入水平方面具有一定的局限性

脊髓空洞症的感觉障碍是

A．节段型

B．传导束型

C．分离性节段型

D．混合型

E．以上均不是

常用的单相整流电路有（）种。

A.2

B.3

C.4

D.6