有序的政治参与，是公民参与政治生活的基本要求。公民要想有序参与政治生活，必须做到

健康成年人正常情况下20岁时最大心率为（）

A.170

B.180

C.190

D.200

阅读理解。

      A husband-and-wife team from California reached the Pacific Ocean after a 4,900- mile-cross -country

walk, becoming the first to backpack the American Discovery Trail in one continuous walk. 

      Marcia and Ken powers, of Pleasanton, started the travel across 13 states, through 14 national parks and

16 national forests on Feb. 27 from Cape Henlopen in Delaware. Nearly eight months later, the excited couple

walked through water into the Pacific Ocean at Point Reyes, a day ahead of time.

     "We are a little sad that a great adventure is over. It was a fantastic adventure. And now we go home and

just do housework. It's really sad." Marcia, who said she's in her 50s, and her 60-year-old husband traversed

cities, desert, mountains and farmland before reaching the Pacifics alone with arms around each other's

backpacks. They overcame deep snow in the East, a quicksand in Utah, close lightning strikes in the Mid-west

and strong desert sandstorms in the West while averaging 22 miles a day and taking only four days off. But

they enjoyed the French history of St. Louis' the beauty of the Colorado Rockies and the kindness of strangers

they met along the way. They particularly remember two brothers-a doctor and dentist-who put them up in

their homes, after terrible days, and a motorcyclist who gave them water after they failed to find any on Utah's

lonely Wah Wah Desert.

      "Americans are truly warm-hearted and wonderful people." Marcia Powers said. "We got to meet people

that we would never meet in our daily living at home. We got to touch it with our feet and hands and smell all

its scents and hear its wildlife. It' s an amazing country," she added.

1. Which of the following about couple's walk is TRUE?[ ]

A. The walk covered more than 13 states.

B. The walk lasted about half a year.

C. The walk didn't meet any desert.

D. The walk might end before October 27.

2. The underlined word "traversed" in the third paragraph means "_____."[ ]

A. enjoy

B. move across, through or over

C. overcome

D. look at

3. According to the text, we can infer that during the walk the couple _____.[ ]

A. were treated warm-heartedly by the local people

B. never stopped to have a rest

C. were ever caught in a heavy rain and became ill

D. felt the quicksand in Utah was very interesting

4. The couple went through many places except _____. [ ]

A. big rivers

B. desert

C. hills

D. fields

产后5个月哺乳妇女，月经未复潮，要求避孕，妇科查为子宫正常大小，无压痛，活动，双附件(-)，下列哪种方法不宜选用( )

A．口服避孕药
B．宫内节育器
C． * * 隔膜
D．阴茎套
E．体外排精

在安装Y型密封圈时，唇边应面对无压力的油腔。（）

罗瑟、瑞夫斯在他的独特销售建议中提出以下内容（）。

A.每一条广告都必须给消费者提出一条建议

B.提出的建议必须是竞争对手没有或无法提出的

C.要用明显的夸大之词赞美产品

D.提出的建议必须有足够的力量打动消费者

E.要努力贬低竞争对手的产品