在二位三通式防滑阀中,三通是指阀分别与大气、制动储风缸、()相通。

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问题:

在二位三通式防滑阀中,三通是指阀分别与大气、制动储风缸、()相通。

考点:铁路机车车辆驾驶人员资格考试新城市轨道交通车辆制动系统新城市轨道交通车辆制动系统题库
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“低碳生活”倡导我们在生活中所消耗的能量、材料要尽量减少,从而减少二氧化碳的排放量.其中对我们学生来说双面使用纸张就是一种有效方式,请从两方面说明双面使用纸张和“低碳生活”的关系.

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脱髓鞘性疾病是()

A.神经元及髓鞘均受累

B.神经元、轴索及髓鞘均受累

C.轴索及髓鞘变性

D.髓鞘破坏,轴索相对完整

E.神经元及轴索变性

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I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop".

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) . She had only one small, flat bag with a few candies—fiftycent candies! I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

11()

A.draw 

B.stay 

C.move 

D.meet

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民歌的创作和演唱以()为基本特征。

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出租汽车驾驶员在考核周期内注册在岗时间少于6个月的,其服务质量信誉考核等级最高为()级。

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