用于物料提升机使用的钢丝绳安全系数应取()A:1.0m B:1.5m C:1.8

题型:单项选择题

问题:

用于物料提升机使用的钢丝绳安全系数应取()

A:1.0m

B:1.5m

C:1.8m

D:2.0m

考点:安全员继续教育安全员继续教育题库
题型:单项选择题

关于分程调节系统的说法中,正确的是()。

A、一个调节器的输出可以控制两个或两个以上的调节阀

B、调节阀的输出信号被分割成若干个信号范围段,每一段信号控制一个调节阀

C、分程控制的应用可以扩大调节阀的可调范围,改善调节品质

D、可用于控制两种不同的介质,以满足工艺生产的要求

题型:单项选择题

不属于颗粒剂质量检查项目的是()

A.溶化性

B.粒度

C.水分

D.崩解度

E.微生物限度

题型:单项选择题

阅读理解

      "Grandma, Grandma, tell us a story!" Four darling children sat by my feet, looking up at me

expectantly.

     Suddenly, we were interrupted clapping. "Terrific," the director said, stepping up the stage from

the aisle(过道). "Except, could you kids face the audience a bit more?"

     The kids shifted to face the empty seats, which would be filled in a few days for the church play.

"Perfect," the director said. "Now, Grandma, read to your grandchildren." A pang of sadness hit me.

If only I could read to my real grandchild!

     I had a granddaughter, but I'd never met her. Sixteen years earlier my son was involved in a

relationship that ended badly. But out of it came a blessing: a baby girl named Lena. I hoped to be a

grandmother to her-but shortly after the birth, the mother moved without any address left. Over the

years, I asked around town to try and find my son's exwife(前妻), but it seemed that she didn't want

to be found.

     I 'd just joined this new church a week earlier, and was at once offered the part of Grandma in the

play.  At least now I could pretend to be a grandma. The rehearsals went well, and finally the day of

the show arrived. The performance was great. "You all looked so natural up there," one of my friends

said.

     Afterward, we went to the church basement for refreshments(茶点). I walked over to one of the

girls in the play, Rehearsals had been such a whirlwind(一片忙乱) that we never really got to talk.

"How's my granddaughter?" I joked.

     "Fine!" she answered. Just then, someone else walked up and asked the girl her name.

     I wasn't sure I heard the girl's answer correctly. But it made me ask her another question. "What's

your mother's name?"

    She told me, I was still in shock. "And what's your father's name?" I asked. She told me. It was my

son.

    She'd only started going to that church a week before I did. Since that day of the play, we've stayed

close. Not long ago, she even made me a great grandma.

1. What was the author doing at the beginning of the story?

A. Telling a story.  

B. Playing a game.

C. Preparing for a play.  

D. Acting in a movie.

2. Why did the author feel "A pang of sadness" at the words of the director?

A. The director's words reminded her of her lost granddaughter.

B. The director's words hurt her so badly.

C. She wished that she had a real grandchild.

D. The director wasn't content with her performance.

3.We can infer that when writing the story, the author felt ________.

A. lighthearted  

B. heartbroken

C. confused  

D. anxious

题型:单项选择题

测定酶活性时要测酶促反应的初速度,其目的包括()。

A.使酶促反应速度与酶浓度的正比

B.为了提高测定的灵敏度

C.为了节约使用底物

D.为了防止出现底物抑抑制,或产物抑制

E.为了维持二级结构

题型:单项选择题

本地光传输网能力指由本地()等各种传输设备叠加后得到的最上层传输能力的总和。

A.ASON

B.PDH

C.SDH

D.DXC

E.DWDM

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