干粉灭火器是利用()作动力,将筒内的干粉喷出灭火的器材。A、低压一氧化碳 B、高压一

题型:单项选择题

问题:

干粉灭火器是利用()作动力,将筒内的干粉喷出灭火的器材。

A、低压一氧化碳

B、高压一氧化碳

C、低压氮气

D、高压氮气

考点:加油站操作员考试初级加油站操作员考试初级加油站操作员考试题库
题型:单项选择题
复数z满足z•(1+i)=2i,则|z|等于(  )
A.1B.
2
C.2D.3
题型:单项选择题

下列反应的离子方程式书写不正确的是[ ]

A.4mol/L的NaAlO2溶液和7mol/L的HCl等体积均匀混合:4A1O2-+7H++H2O==3A1(OH)3↓+A13+ 

B.用石墨电极电解CuSO4溶液:2Cu2++2H2O2Cu+O2↑+4H+

C.将0.1mol/L 25mL盐酸逐滴缓缓滴入0.1mol/L 25mLNa2CO3溶液中,并不断搅拌:

2H++CO32-==CO2↑+H2O

D.硫酸氢钠溶液与足量氢氧化钡溶液混合:H++SO42-+Ba2++OH-==BaSO4+H2O

题型:单项选择题

在脑中心疝的治疗中,哪一期为抢救治疗的关键时期()

A.间脑期

B.中脑期

C.中脑一脑桥上部期

D.脑桥下部一延髓期

E.延髓期

题型:单项选择题

阅读理解。

     It was the first day of school. I stood up to look around when a gentle hand touched my shoulder. I

turned around to find a little old lady smiling at me. She said, "Hi handsome. My name is Rose. I'm

eighty-seven years old. Can I give you a hug?"

     I laughed and said, "Of course!" And she gave me a big hug. "Why are you in college at such an age?"

I asked.

     She jokingly replied, "I'm here to meet a rich husband, get married, and have kids and then retire and

travel."

     "No seriously."

     "I always dreamed of having a college education and now I'm getting one!"

     We became friends at once. Over the course of the year, Rose easily made friends wherever she went. She loved to dress up and she was happy with the attention given to her from the other students. At the

end of the term we invited Rose to speak at our football banquet(宴会). I'll never forget what she taught

us in her speech.

     "We do not stop playing because we are old; we grow old because we stop playing. There are only

four secrets to staying young, being happy and achieving success. You have to laugh and find humor

every day. You've got to have a dream. When you lose your dreams, you die. We have so many people

walking around who are dead and don't even know it! There is a huge difference between growing older

and growing up. If you are nineteen years old and lie in bed for one full year and don't do one useful thing, you will turn twenty years old. If I am eighty-seven years old and stay in bed for a year and never do

anything, I will turn eighty-eight. Anybody can grow older. That doesn't take any ability. The idea is to

grow up by always finding opportunity to do productive things. Have no regrets(遗憾;后悔). The

elderly usually don't have regrets for what we did, but we regret for things we

did not do."

     At the year's end Rose finished the college degree. One week after graduation Rose died peacefully

in her sleep. Over two thousand college students attended her funeral to honor the wonderful woman!

1. While meeting Rose at the college for the first time, the author was curious about _______.

A. her age

B. her life

C. her purpose

D. her dream

2. By saying "I'm here to meet a rich husband, get married, and have kids and then retire and travel",

    Rose was trying to be _______.

A. humorous    

B. amazing      

C. confident

D. smart

3..What else did Rose most probably say at the football banquet?

A. "It seems that my young days are over."

B. "Don't do much in order to stay young."

C. "The people who fear death are those with regrets."

D. "When we are old, we can do nothing."

4. The story of Rose in the text shows that ________.

A. it is good to make friends with old people

B. it is necessary to have a college education for old people

C. it is important to have a healthy body when people are getting old

D. it is never too late to be what you can possibly be

题型:单项选择题

能在潮湿环境中正常生长,不能忍受较长时间水分不足的抗旱能力最小的陆生植物又叫()

A.陆生植物

B.湿生植物

C.旱生植物

更多题库