异种钢焊接时,选择工艺参数主要考虑的原则是( )。A.减小熔合比 B.增大熔合比

题型:单项选择题

问题:

异种钢焊接时,选择工艺参数主要考虑的原则是( )。

A.减小熔合比

B.增大熔合比

C.焊接效率高

D.焊接成本低

考点:焊工高级焊工焊工高级
题型:单项选择题

“Can I see my baby?”asked the happy new mother. The bundle(婴儿包)was placed in her arms and when she moved the fold of cloth to look upon his tiny face, she gasped-the baby had been born without ears. Time, however, proved that the baby’s hearing was perfect except his appearance.

One day when he rushed home from school and threw himself into his mother’s arms,he cried out bitterly,“A boy, a big boy…called me-a f—…freak.”She sighed, knowing that his life was to be endless of heartbreaks.

He grew up,handsome for his misfortune.A favorite with his fellow students,he might have been class president,but for that.He developed a gift for literature and music.

The boy’s father had a talk with the family doctor.Could nothing be done?“I believe we could graft(移植)on a pair of outer ears,if they could he donated(捐献),”the doctor decided.So the search began for a person who would make such a sacrifice(牺牲)for a young man.Two years went by.Then,“You’re going to the hospital,son.Mother and I have someone who will donate the ears you need.But it’s a secret.”said the father.

The operation was a brilliant success.His talents blossomed into genius.School and college became a series of successes.Later he married and entered the diplomatic(外交)service.“But I must know!”he urged his father.“Who gave so much for me? I could never do enough for him.”

“I do not believe you could,”said the father,“but the agreement was that you are not to know…not yet.”The years kept the secret,but the day did come …one of the darkest days that ever passed through a son.He stood with his father over his mother’s casket(棺材).Slowly and tenderly,the father stretched forth a hand and raised the thick,reddish-brown hair to let out the secret.

41.The story is mainly about____________.

A.hew a boy had new ears through an operation

B.what a devoted parent privately did for the child

C.how a disabled boy turned into a useful person

D.why a donator made a sacrifice to a bright boy

42.From the first paragraph we know that the mother____________.

A.was determined to donate her ears to pedect her son

B.kept her husband unknown about the baby’s situation

C.felt shocked and disappointed to see her new baby

D.complained of her bad luck to have a disabled child

43.The underlined word“freak”in Paragraph 3 is the closest in meaning to“____________”.

A.slow—acting person                            B.ugly—looking child

C.badly—behaved student                D.strangely—shaped creature

44.What can be inferred from the passage?

A.The agreement was between the donator and the family.

B.The boy was so popular that he was made class president.

C.Finally the boy came to know who the donator was.

D.The mother donated her ears to her son after she died.

45.What moral lesson can we draw from this reading? A.Real love lies in what is done unknown rather than what is done known.

B.It is up to parents to help their children heart and soul.

C.True beauty lies only in the heart not in appearance.

D.It is a virtue for young generations to learn to be grateful.

题型:单项选择题

从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。()

A.A

B.B

C.C

D.D

题型:单项选择题

慢性食管炎患者为增加食管下段括约肌压力,应选择的食物是()。

A.巧克力

B.脱脂牛奶

C.橘子汁

D.番茄汁

E.全脂牛奶

题型:单项选择题

孕期长期酮体阳性可能引起胎儿何种畸形

A.视网膜
B.心脏
C.神经管
D.肝脏
E.肾脏

题型:单项选择题

在千型压裂车上应用比较普通的是()安全阀。

A.切削式

B.弹簧式

C.卡套式

D.脉冲式

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