因式分解: (1)x2(a-2)+y2(2-a); (2)-3a3+12a2m-

题型:计算题

问题:

因式分解:

(1)x2(a-2)+y2(2-a);

(2)-3a3+12a2m-12am2

考点:因式分解
题型:计算题

女性,55岁,鼻塞、头痛1周,无任何阳性体征

你的诊断依据是哪些()

A.囊性占位性病变

B.与脑脊液信号类似

C.周围有明显水肿

D.MR增强示病变无强化

E.病灶可以强化

题型:计算题

真核生物中经RNA聚合酶Ⅲ催化转录的产物有

A.mRNA

B.tRNA

C.5.8S-rRNA

D.18S-rRNA

题型:计算题

A man, who sometimes takes my bus, is in rags. His life seems different from that of the others. He looks exhausted and carries nothing. He appears along a downtown street, seemingly out of nowhere. We sometimes want to know where he sleeps at night.

A few weeks ago he boarded the bus. A few stops later, a young woman boarded. She swiped (刷) her bus-card, only to find the machine would not accept it. The driver told her to pay the $2.25 fare. “I just bought this card,” she said. “I paid the money...”

The driver said she could take the card back to the sales office and explain the problem. In the meantime she would have to pay the fare for that day. The woman became confused and distressed. The rest of us just watched, wondering how the problem would be solved. Suddenly the man rose from his seat, dropped a few coins into the fare box.

“You’re lucky,” the bus driver said quietly. “He paid for you.” Silence fell over the bus. The rest of us had watched the woman’s discomfort, but he felt it. We lawyers, journalists and business people headed downtown to help fix the world. He fixed her world.

I haven’t seen him since that day. Some people believe angels occasionally drop down and move among us. All I know is that I have a new respect for the simple act of kindness. It speeds us along on our way.

小题1:According to the first paragraph, the author _______.

A.thinks highly of the man

B.often gives the man some help

C.knows the man very well

D.considers the man strange小题2: What does the underlined word “distressed” probably mean?

A.exited

B.generous

C.bored

D.anxious小题3:What did the writer learn from the man?

A.to show concern for other people.

B.to lead a happy life like the man.

C.to share what he has with us.

D.to believe that people are born kind.

题型:计算题

下列各项可以作幻灯片背景的是()。

A.图案

B.图片

C.纹理

D.以上都可以

题型:计算题

混凝土的劈裂抗拉强度是测定混凝土立方体试件的()。

A.抗压强度

B.抗劈强度

C.劈裂抗拉强度

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