某动物细胞质量大约的0.000625g，0.000625用科学记数法表示为（ ）

阅读下列短文，把A—E五个句子填入文中空缺处，使短文内容完整正确。

A farmer’s dog, Dolly, had babies, and the farmer needed to sell them. He painted a sign and put it in his yard.      1     , a little boy walked up to him.

“Sir,” he said, “I want to buy one of your dogs.”

“Well,” said the farmer, “these dogs are very expensive.”

“     2     ” asked the boy.

“Sure,” said the farmer. “Here, Dolly!” he called.

Dolly ran out from the doghouse and four little dogs followed her. The boy became excited.

Then, the little boy noticed another dog. This one was smaller.     3     

“I want that one,” the boy said, pointing to the little dog.

The farmer said: “     4      He will never be able to run and play with you like these other dogs.”

The little boy reached down and rolled up one leg of his pants. He showed a cast (石膏) on his leg and a specially made shoe. He said: “You see, sir,       5     , and he will need someone who understands.”

若市场处于反向市场，做多头的投机者应( )。

A．买入交割月份较近的合约

B．卖出交割月份较近的合约

C．买入交割月份较远的合约

D．卖出交割月份较远的合约

如图所示，宽度L=1.0m的足够长的U形金属框架水平放置，框架处在竖直向上的匀强磁场中，磁感应强度B=1.0T，框架导轨上放一根质量m=0.2kg、电阻R=1.0Ω的金属棒ab，棒ab与导轨间的动摩擦因数μ=0.5，现牵引力F以恒定功率P使棒从静止开始沿导轨运动（ab棒始终与导轨接触良好且垂直），当棒的电阻R产生热量Q=7.0J时获得稳定速度，速度大小为3.0m/s，此过程中通过棒的电量q=4.1C。框架电阻不计，g取10m/s²。

求：

（1）当棒的速度到达稳定时，棒ab所受的安培力的大小和方向。

(2) 牵引力F的恒定功率P为多大？

（3）ab棒从静止到稳定速度的时间多少？

简述持续性心房颤动的定义。

自然人死亡后，其近亲属因下列哪种侵权行为遭受精神痛苦的，不可以向人民法院起诉请求赔偿精神损害

A．甲为乙的仇敌，在乙死后不久便四处张贴大字报称“乙的死是作孽太多的缘故，是报应，快哉快哉”

B．丙偷盗死者丁的遗体并出售器官牟利

C．某著名小说家将死者戊生前告诉的隐私写入自己创作的长篇小说中，但隐去死者姓名

D．某殡仪馆因工作疏忽提前焚烧了即将举行追悼会的死者己的遗体，无奈只有以死者庚的遗体冒充，追悼会举行过程中此事被已的家属发现