大功率汽轮机转子采用()冷却。 A.蒸汽冷却结构 B.空气冷却结构 C.水冷却结构

题型:单项选择题

问题:

大功率汽轮机转子采用()冷却。

A.蒸汽冷却结构

B.空气冷却结构

C.水冷却结构

D.油冷却结构

考点:汽轮机检修汽轮机本体检修工(中级)汽轮机本体检修工(中级)题库
题型:单项选择题

It’s been years since I _____ myself so much.

A.enjoy

B.enjoyed

C.have enjoyed

D.had enjoyed

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患儿,女,5岁,体形消瘦,生长发育迟缓,易疲劳、乏力、气急,胸骨左缘第2~3肋间闻及收缩期喷射性杂音,肺动脉瓣第二心音亢进伴固定分裂。

该患儿术后护理,下列哪项不正确()。

A.门诊定期复查

B.密切观察生命征

C.保持呼吸道通畅

D.注意术后并发症的观察

E.术后3个月可进行剧烈运动

题型:单项选择题

语法填空。

     For 72 years, Lisa Gumpel kept a secret. "For a long time, I was determined not to tell

anyone about it," said Gumpel, 85 years old,  1 finally settled in Minnesota after the war

and now lives in the Twin Cities.

     She told people that she and her two sisters were among 669 Jewish(犹太的) children

 2 (save) by a kind man to escape from the Nazi concentration camp(纳粹集中营) in 1939.

Their rescuer was a British businessman named Nicholas Winton, who also kept  3 story

to himself until his wife found a list of the children's names.

     Gumpel was shocked in 1988 when the   4 _ (true) about Winton's one-man rescue operation

finally came out. "Nobody knew that he actually did all by  5  ," she said. "He worked so

hard to save lives."

     Winton still doesn't think that he's a hero, arguing that his life was never   6 danger and that

he was doing 7 he feels every person should do.

     A party was held for him and the people he'd saved. Gumpel was   8 (excite) when she finally

met him. "He still 9 (treat) us all like we're his kids," she said   10   a warm smile on the face.

题型:单项选择题

甲、乙两列火车在两条平行的铁轨上匀速行驶,两车交汇时,甲车座位上的乘客从车窗看到地面上的树木向北运动,看到乙车向南运动.由此可判断[ ]

A.甲、乙两车都向南运动

B.甲、乙两车都向北运动

C.甲车向南运动,乙车向北运动

D.甲车向北运动,乙车向南运动

题型:单项选择题

配制pH=7的缓冲溶液,应选用:

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