问题 单项选择题

以下关于合金与瓷粉的要求哪项是错误

A.良好的生物相容性

B.有良好的强度与硬度

C.两者可产生化学结合

D.瓷粉的热膨胀系数略大于合金

E.合金熔点大于瓷粉

答案

参考答案:D

解答题
完形填空

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

My childhood was less than ideal--in fact, I was the only girl in my family who did not run away from home during adolescence.

 小题1:  . Coming from a blue-collar family and an easy rural high school to a white-collar university that gave a “C” for work that would be a “B” at another school, I felt like a misfit financially, culturally, and educationally.

Somehow I made it through my freshman year, and headed back for the second year.   小题2:.

Barb seemed the exact opposite of me.   小题3: . One day I watched Barb draw while waiting for class to start. I sighed, thinking how Barb could do anything she wanted to: draw, paint, sing, and play the guitar.

 小题4:  . “I wish I was artistic,” I replied.

“Mary,” she said in amazement. “You ARE artistic!”

I figured she was just being nice, but if Barb thought I was artistic, there must be something to it, even if I thought my only artistic abilities were with words. Thanks to her, I learned to recognize my artistic abilities.

This summer I wrote to Barb and reminded her of that conversation.   小题5: . I had removed a closet in my bedroom for more space, and needed to choose colors and wall hangings. I felt quite upset. Just as I was about to give up, I heard Barb’s voice in my memory, “Mary, you ARE artistic!” With her words ringing in my head, I found the perfect color for the walls and the perfect pictures for the walls.

Thanks, Barb, for believing in me all those years ago.

A.It was 1990 when Barb said those words for me.

B.Barb heard me sigh, and asked what was wrong.

C.I let her know her words are still working their magic.

D.I’d been writing poems and short stories since I was 12.E. She was popular, out-going, confident, talented, and artistic.

F. I’m so glad I went back, because that was the year I met Barb.

G. After high school I moved 300 miles away for college, but quickly had second thoughts about whether I belonged there.