根据破产法律制度的有关规定，下列各项中，属于破产债权的是()。A．破产宣告前司法机关

一列简谐横波沿直线传播，在这条直线上相距d=1.8m的A、B两点振动图象分别如图中的（甲）、（乙）所示．已知波长λ符合0.5m＜λ＜1.0m．求这列波的波速v．

　　班里举行一次主题为“远离毒品”的班会，请你在黑板上写两句话，以彰显主题，营造气氛。要求每句话不少于7个字，两句话字数相等，句子结构大体一致。

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首次将按摩与其他内服、外治法并称，明确的将按摩作为一种疗法提出的是以下哪部著作：（）

A.《黄帝内经》

B.《引书》

C.《五十二病方》

D.《足臂十一脉灸经》

E.《阴阳十一脉灸经》

I will always remember my mother’s last few days in this world.

On February 14th, 2000, my class went on a field trip to the beach. I had so much fun. When we returned to school, my teacher told me to go to the headmaster’s office. When I got into the office, I saw a police officer. Suddenly I realized something was wrong. The police officer told me what had happened and we went to pick my sister up. After that, we went to the hospital and waited. Time went slowly. Finally, we got to see our mother. It was terrible.

On the next day, the headmaster came and told my two teachers what had happened. I was taking a rest that day. I knew it had something to do with my mother. I kept thinking that she either died or had gotten better. How I wished that she had gotten better. When my teacher took me outside, my sister ran up to me. She started crying, "She’s gone. Teresa, mommy’s gone. She’s dead. " I couldn’t believe it. We jumped into the car and drove straight to the hospital. Most of my family were there. The silence was terrible. I knew I had to say goodbye.

Today when I look back, I still miss my mother very much, but I know that I will live. My mother was a p mother, who had the biggest heart. My mother was an angel walking on the earth. I will always remember her as living. When someone is asked who their hero is, they usually say someone famous, like Michael Jordan or Britney Spears. When someone asks me who my hero is, I tell them, my mother. My mother lives every day. That is what makes her at rue hero.

Who brought the writer the bad news that her mother was ill （）

A．Her sister.

B．The headmaster.

C．Her teacher.

D．The police officer.

随着髓腔的增龄性变化，在磨牙髓腔中继发性牙本质（）

A.主要沉积在舌侧髓壁

B.主要沉积在根尖孔

C.主要沉积在髓室顶

D.主要沉积在髓室底

E.主要沉积在颊侧髓壁