可引起血管扩张性肺门增大的疾病是A．肺动脉闭缩 B．肺气肿 C．二尖瓣狭窄 D．肺动

在10000米跑的比赛中，如果运动员的人数超过（）人，则可将他们分成两组同时起跑，大约（）的运动员为第一组，在常规起跑线处起跑，大约（）的运动员在第二弧线起跑线后起跑。

期望5年内每年年末从银行提款10000元，年利率为10%，按复利计，开始应存入银行( )元。

A．50000

B．45000

C．44000

D．37900

Dear David,

I’m glad you would like to share your feelings with me．It’s hardly surprising that your feelings of not being “grown up” have come on strongly at this point in your life, just before you’re about to become a father．You are asking: Will I make a good father? How will I cope? I think nearly every man must have the occasional feelings of self-doubt and inadequacy before the birth．

It’s difficult, honestly, to feel grown-up unless you have something less grown-up to relate to．The boss with a hen-pecking wife may feel like a seven-year-old when he’s at home．But as he walks through the office door, and knows he’s going to be surrounded by staff for advice, he grows into a fully mature man．And I think it’s a mistake to imagine that we all feel, as we age, a kind of progress of states, from the baby to the adult．Most people feel, on Tuesday, about three years old, and on a Wednesday, around 80．

There’s a common remark that“all men are little boys”, but it’s not true．It’s more true that men often behave like little boys．But nearly all people, at some moments in their lives, are able to be greatly mature．．Once your baby arrives, you’ll soon feel less childlike．When your child tries to put its fingers into the electric plug, the adult in you will rise up to prevent it．

Comfort yourself, David, with two truths．One is that your friends laugh when they talk about this subject because they, like you, feel frightened．And remember that people who haven’t grown up don’t go around talking about the fact．

Good luck to you and your little one．

Sincerely Yours,

Miss Advice

小题1:According to the passage, Miss Advice thinks David’s self-doubt ________．

A．valuable

B．unusual

C．natural

D．bearable小题2:From Paragraph 2, we can learn that people’s sense of maturity ________．

A．will increase with age

B．is obviously seen at home

C．changes with different situations

D．becomes stronger with familiar people小题3:Miss Advice holds that ________．

A．all men behave like little boys

B．people tend to laugh at the subject

C．men with a baby feel more grown-up

D．people enjoy talking about their immaturity小题4:Miss Advice wrote the letter to ________．

A．offer suggestions to a future father

B．teach people how to grow up

C．encourage people to be responsible

D．solve problems of the less grown-up D

桩冠修复时为确保牙髓治疗效果和预防根折，一般要求根尖部保留充填材料（）

A.0.5～2.5mm

B.1～3mm

C.不小于4mm

D.3～5mm

E.5～7mm

t检验的主要应用是(　　　)

A．两个计量资料样本均数的比较

B．多个计量资料样本均数的比较

C．两个计数资料样本率的比较

D．多个计数资料样本率的比较