铸钢由于熔点高，收缩率大，所以铸造性能差。

My dad has been driving a truck for almost his entire life. He’s usually  小题1:  all the weekdays and comes home only at weekends. Sometimes he stays ___小题2:__for two weeks at a time. __小题3:_I don't get to see him as often as I wish, we remain very __小题4:___.

My dad is the type of person who doesn't let you __小题5:__ up anything that you start. When I was eleven, my father bought me a piano. At first I was so __小题6:__ about it that I would spend hours and hours learning how to play. Then it got _小题7:_. I was so tired of it that I asked if I could stop. Much as I tried, he __小题8:__me to go on. Now I have been playing for almost five years. I love it and I' m glad I __小题9:_my dad's advice.

My dad is _小题10:__talented, for he has been playing the guitar for over 20 years. Under his influence, I also like 小题11:    now. Sometimes my dad can be my biggest  小题12:  . He makes me smile even when I lose in a talent show小题13:  . Sometimes he can be my biggest critic(批评家). He   小题14:  ignore the small mistakes I make. He encourages me never to lose   小题15:  , because he thinks that all my efforts will   小题16:   one day.

My dad is generous. Every Thursday night, he    小题17:   to read to the children at a children’s club. When he reads, their   小题18:   light up with curiosity about what will happen next. I feel   小题19:   of having a person in my family who cares enough to volunteer to   小题20: .

I love Dad with all my heart. He’s a hero in my heart and the most wonderful person in the world.

小题21: 

A．on

B．with

C．out

D．in小题22:

A．away

B．home

C．inside

D．alone小题23:

A．In case

B．Even though

C．If only

D．As if小题24:

A．polite

B．kind

C．different

D．close小题25:

A．give

B．put

C．take

D．speed小题26:

A．nervous

B．anxious

C．crazy

D．familiar小题27:

A．rough

B．difficult

C．disappointing

D．boring小题28: 

A．promised

B．persuaded

C．reminded

D．suggested小题29:

A．received

B．challenged

C．took

D．listened小题30: 

A．physically

B．typically

C．musically

D．exactly小题31: 

A．chatting

B．dancing

C．writing

D．drawing小题32:

A．director

B．supporter

C．scholar

D．sponsor小题33:

A．however

B．so

C．and

D．still小题34:

A．ever

B．often

C．never

D．even小题35:

A．aim

B．dream

C．strength

D．heart小题36: 

A．come true

B．take risks

C．pay off

D．let out小题37:

A．agrees

B．likes

C．intends

D．offers小题38:

A．bodies

B．arms

C．hands

D．faces小题39:

A．jealous

B．optimistic

C．proud

D．happy小题40:

A．help

B．read

C．work

D．drive

在英版《潮汐表》第三卷和第四卷中印有几张供求任意时潮高和任意潮高的潮时用的曲线图（）。

A．一张

B．每附港一张

C．每港一张

D．每主港一张

当变速器齿轮的啮合齿磨成锥形时，易产生跳档现象。

在进行几何定向时，应编制测量技术设计书，其内容包括什么？

1979年WH0将冠心病分为（）

A.5型

B.6型

C.3型

D.2型

E.4型