年轻男性，于饮酒后突发腹痛、腹胀、恶心呕吐，查体：急性病容，腹平坦，上腹部轻度肌紧张

《煤矿安全规程》规定：采掘工作面最低风速不得小于（）m/s最高风速不得大于（）m/s。

如图所示，加速电场PQ间的加速电压为U₁，一不计重力的带正电粒子由静止开始经加速电场加速后，沿偏转电场AB（内部看成是匀强电场，忽略外部周围产生的电场）的中心线OO'以垂直电场的方向进入偏转电场．已知偏转电场的电压恒为U₂=20V，A极板带正电，极板长L=24cm，极板间距d=24cm．有一长度也为d的固定挡板M放在距AB的右端为L处，与OO'垂直，中点H在OO'上，在挡板M的右侧L处有一足够大的荧光屏N垂直OO'放置．调整加速电压U₁可以使粒子打到荧光屏上．

（1）求粒子打到光屏上的位置距O'最远时，粒子离开偏转电场时的速度方向与进入时速度方向的夹角及最远位置距O'点的距离．

（2）求粒子能够打到荧光屏上的范围及所对应的加速电压U₁满足的条件．

阿司匹林哪组作用与相应机制不符

A．解热作用是抑制中枢PG合成

B．抗炎作用是抑制炎症部位PG合成

C．镇痛作用主要是抑制中枢PG合成

D．水杨酸反应是过量中毒表现

E．预防血栓形成是抑制TXA2＞PG12

阅读理解。

                                                       Obama still smokes in secret

     US President Barack Obama may have just made life more difficult for cigarette makers, but he still

smokes every now and then in secret.

     Obama, who has publicly struggled to quit smoking, said he still hasn't completely kicked the habit

even after signing a law this week that will likely set tough new rules for the tobacco industry.

      "As a former smoker I constantly struggle with it. Have I fallen off the wagon sometimes? Yes. Am

I a daily smoker, a constant smoker? No," Obama said at a news conference.

     "I don't do it in front of my kids, I don't do it in front of my family. I would say that I am 95 percent

cured, but there are times where I mess up," he said.

     The new law gives the US Food and Drug Administration the power to strictly limit the making and

marketing of tobacco products.

      At a White House signing ceremony Monday, Obama said that he was among the nearly 90 percent

of smokers who took up the habit before their 18th birthday.

      "Once you go down this path it's something you continually struggle with, which is exactly why the

law we signed is so important because what we don't want is kids going down that path in the first place,"

he said at the news conference.

     Nearly 20 percent of Americans smoke and tobacco use kills about 440,000 people a year in the United

States due to cancer, heart disease, and other serious diseases.

1. According to the passage, Obama _______.

A. was cured of a disease

B. had an accident

C. made Americans' life difficult

D. signed a law this week

2. What does the underlined sentence mean in the third paragraph?

A. Have I dropped from the wagon?

B. Have I stopped smoking completely?

C. Do I still smoke sometimes?

D. Do I still smoke as much as before?

3. Which of the follow is NOT TRUE?

A. Nearly 90 percent of the population of America smoke.

B. Nearly 90 percent of the smokers of America began to smoke before they turned 18.

C. Nearly 1/5 of Americans smoke.

D. Smoking kills about 440,000 people a year in the USA.

4. The new law first looks at _______ health.

A. adults'

B. middle-aged people's

C. women's

D. children's

旅行社对旅游行政管理机关作出的处罚决定不服，逾期不申请复议，不向人民法院起诉，又不履行处罚决定的，由 ( )申请人民法院强制执行，或者依法强制执行。

A．做出决定的旅游行政管理机关的上一级管理机关
B．旅游行政管理机关
C．所在地旅游行政管理机关
D．做出决定的旅游行政管理机关