再生障碍危象早期骨髓检查的特征是（） A.有核细胞减少 B.看不到原、早幼红细胞 C

在体外无创地显示活体内生理和病理过程（）

A.MR

B.PET

C.PET／CT

D.MRS

E.SPECT

分解因式：ax²+2axy+ay²=______．

以下错误的说法是

A．低水平辐射提高淋巴细胞反应性

B．低水平辐射提促进抗体形成

C．低水平辐射增强抗肿瘤的细胞毒效应

D．低水平辐射使先天免疫严重受抑制

E．低水平辐射促使免疫功能增强

Once there was a king. He had two old ministers. One was kind and the other was bad. The bad minister often said bad words about the kind minister before the king. The king was very angry.

One day the king said to the bad minister , “Write two words on two pieces of paper. Write ‘live’ on one piece and ‘die’ on the other . Then put them in a jar and tell him to choose. If he takes out the paper with ‘live’ on it , I will let him go. If he takes out the paper with ‘die’ on it ,I will kill him at once.”

The bad minister was quite happy. He got two pieces of paper ready. He wrote “die” on each piece of paper.

The kind old man came. He knew the bad minister wanted to kill him. He also knew the words on the two pieces both “die”, but he knew what to do. Later the king had to keep his word and let the old minister go. Do you k now what the kind man do about this at that time?

小题1:The king was angry with              .

A．himself

B．the kind minister

C．the bad minister

D．the two ministers小题2:      was told to write “live” and “die”.

A．The king

B．The kind minister

C．The bad minister

D．The two ministers小题3:There is no “live” on both pieces of paper because           .

A．the kind minister didn’t want it.

B．the bad minister couldn’t write the word

C．the king told the bad minister not to write it

D．the bad minister hated the kind minister and wanted to kill him小题4:      must be disappointed in the end .

A．The king

B．The kind minister

C．The bad minister

D．All the other ministers

石器时代——蒸汽时代——电子信息时代

A． 清代——明代——元代

B．生产——制造——打量

C． 甲骨——竹简——纸

D．印刷——编写——出版