所谓合理选材,叙述正确的是()。 Ⅰ.以满足使用性能为前提; Ⅱ.最大限度地发挥材料

题型:单项选择题

问题:

所谓合理选材,叙述正确的是()。

Ⅰ.以满足使用性能为前提;

Ⅱ.最大限度地发挥材料的潜力;

Ⅲ.力求所花的总费用最低。

A.Ⅰ+Ⅱ

B.Ⅱ+Ⅲ

C.Ⅰ+Ⅲ

D.Ⅰ+Ⅱ+Ⅲ

考点:轮机工程零件材料的选用及热处理零件材料的选用及热处理题库
题型:单项选择题

Many parents have learned the hard way that what sounds like open communication is otfen the very thing that closes a youngster’s ears and mouth, One common mistake is the Lecture, the long monologue that often starts with “When I was your age……”Eighteen –year –old Kelly calls lectures “Long , one-side discussions in which I don’t say much.”

Kids reflexively(条件反射地)shout down in the face of a lecture , Their eyes glaze over(呆滞),and they don’t register any incoming information , Listen to 13-year –old Sarah describe her least favorite times with her mom and dad, “First, they scream, Then comes the“We’re so disappointed’ speech , Then the ‘I never did that to my parents’ lecture begins , After that, even if they realize how ridiculous they sound, they never take it back’”.

Lines like “When you have children of your own, you’ll understand” have been seriously said by parents since time immemorial, But many of our expert parents, like Bobby , a registered nurse and mother of three, feel that by falling back on cliches(陈词滥调)to justify our actions, we weaken our position.

Since kids are creatures of here and now, the far-off future has no relevance to them, Therefore ,good communicators like Bobby suggest, “Give specific reasons for your actions in present language:‘I’m not letting you go to the party because I don’t think there will be enough adult supervisions(监护)”。

Betty, who lives in Missouri ,uses and indirect approach, “I find that warnings are accepted more readily if I discuss a news article on a subject I am concerned about, My husband and I talk about it while our children absorb the information, Then they never think I’m preaching(布道)”.

This really helped when Betty’s kids began driving , Instead of constantly repeating “Don’t drink; don’t speed”, She would talk about articles in the paper and express sympathy for the victims of a car crash, Betty made no special effort to draw her kids into the conversation, She depended on a teenager’s strong desire to put in his opinions—especially if he thinks he isn’t being asked for them.

小题1:The purpose of the passage is to       

A.compare two ways of parents’ communicating with their kids

B.give parents advice on how to communicate with their kids

C.explain why kids won’t listen to their parents

D.introduce kids’ reaction to the communication between them and their parents小题2:Which of the following statements is NOT right?

A.Kids won’t listen to their parents because they think what their parents say is boring

B.Many kids think they have no right to express their own opinions

C.Some kids think their parents should apologize when they are wrong

D.Kids don’t like any discussion at all.小题3:What does the underlined word in the first paragraph mean?

A.独白

B.对话

C.插话

D.讨论小题4:Which of the following topic may appeal to kids?

A.Parents own experience

B.Kids possible life in the future

C.Something related to kids’ present life

D.What parents have done to their own parents小题5:In order to make kids follow their advice, parents should       

A.tell their kids to listen carefully

B.set out their warnings directly

C.list out as many examples as possible

D.arouse kids’ desire to express themselves

题型:单项选择题

尾桨的功能是()

A.在单旋翼直升机上,尾桨主要功能是提供纵向稳定性。

B.在单旋翼直升机上,能对直升机航向起到操纵和稳定作用。

C.在单旋翼直升机上,尾桨主要功能是提供升力。

题型:单项选择题

28岁经产妇,妊娠39周,今晨6时突然出现 * * 多量流血来院。检查子宫无压痛区,胎头在宫底部,胎心140次/分。血压100/70mmHg。 * * 检查宫口开大2cm,先露部胎臀,可触及胎胞。本例出血最可能原因是

A.前置胎盘
B.胎盘早剥
C.脐带帆状附着前置血管破裂
D.宫颈裂伤
E.子宫破裂

题型:单项选择题

下列选项中,( )是国际标准化组织制定综合类的国际标准。

A.ISO
B.IEC
C.ITU
D.WHO

题型:单项选择题

J.Martin指出,自顶向下的全局规划可以分为______的方式和______的方式。

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