电动轮车辆在行驶的过程中停车制动可以当工作制动使用吗?为什么?

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问题:

电动轮车辆在行驶的过程中停车制动可以当工作制动使用吗?为什么?

考点:矿用重型汽车司机矿用重型汽车司机高级矿用重型汽车司机高级题库
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如图所示,一固定斜面倾角为30°,一质量为m的小物块自斜面底端以一定的初速度沿斜面向上做匀减速运动,加速度大小等于重力加速度的大小g.物块上升的最大高度为H,则此过程中,物块的(  )

A.动能损失了2mgH

B.动能损失了mgH

C.机械能损失了mgH

D.机械能损失了

1
2mgH

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精神病患者甲在其妻陪伴下外出散步,由于8岁顽童乙的挑逗,甲受刺激发病追赶乙。甲妻见状竭力拦阻无效,甲将乙头打破,乙的医疗费用应由( )负担。

A.甲
B.甲妻和乙的父母共同
C.甲妻
D.乙的父母

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腹穿液为血性,臭味较重的多见于()

A.急性阑尾炎

B.胃、十二指肠溃疡急性穿孔

C.结核性腹膜炎

D.绞窄性肠梗阻

E.实质脏器损伤

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男性,56岁。间歇性全程肉眼血尿1年多。血尿伴不规则小血块及轻度膀胱刺激症状,不发热,体重下降3~4kg。B超检查:膀胱左侧壁上有一5cm大小广基肿瘤,侵犯膀胱壁几乎达全层,左输尿管下段扩张,提示膀胱癌。最有助于确诊的检查是()

A.尿细胞学检查

B.膀胱镜检+活检

C.尿培养

D.静脉尿路造影

E.CT

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There are many kinds of friends. Some are always (1) you, but don’t understand you. Some say only a few words to you, but understand you. Many people will step in your life, but only (2) friends leave footprints.
I shall always recall the autumn and the girl with the (3) . She will always bring back the friendship between us. I know she will always be my best friend.
It was the golden season. I could see the yellow leaves (4) with the cool (5) . In such a season, I liked walking alone on the roads covered with leaves, (6) to the sound of them.
Autumn is a (7) season and life is uninteresting. The free days always get me (8) . But one day, the sound of a violin (9) into my ears like a stream flowing in the mountains. I was so surprised that I jumped to see what it was. A young girl, standing in the wind, was (10) in playing her violin.
I had (11) seen her before. The music was so nice that I listened quietly. Lost in the music, I didn’t know that I had been (12) there for so long but my existence did not seem to disturb her.
Leaves were still falling. Every day she played the violin at the comer of the building (13) I went downstairs to watch her performance. I was the only listener. The autumn seemed no longer lonely and life became (14) . (15) we didn’t know each other, I thought we were already good friends. I believe she also loved me.
Autumn was nearly over. One day, when I was listening carefully, the sound suddenly (16) . To my astonishment, the girl came over to me.
"You must like music from the violin." she said.
"Yes. And you play very well. Why did you stop’." I asked.
Suddenly, a (17) expression appeared on her face and I could feel something unusual.
"I came here to see my grandmother, but now I must leave. I once played very badly. It was your listening every day that (18) me. " she said.
"In fact, it was your playing (19) gave me a meaningful autumn," I answered, " Let’s be friends. "
The girl smiled, and so did I. I never heard her play again in my life. I no longer went downstairs to listen to her. Only thick leaves were left behind. But I will always remember the fine figure of the girl. She is like a (20) —so short, so bright, like a shooting star giving off so much light that makes the autumn beautiful.

Ⅱ. 完形填空/Close

A.song

B.dream

C.fire

D.sister

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