关于杂交瘤细胞特点的描述错误的是 （） A.具备了双亲细胞的特点 B.分泌人源性单

柏拉图认为，在理想的社会中，由“贤人”统治国家，武士们保卫国家，农民和手工业者负责生产。据此我们可以推断柏拉图[ ]

A．对雅典民主政治状况持肯定态度

B．赞同抽签选举办法

C．主张按照人的品德确定社会分工

D．主张实行直接民主

下列哪项发明推动了东汉冶铁技术的进步[ ]

A、

B、

C、

D、

Directions:Complete the following passage by filling in each blank with one word that best fits the

context.

     Each of us is different and our body clocks are different too. Some of us can stay awake and work till

late in the night, 1.________   feeling tired, while others may find it easy to wake up and start work  

2.________, instead of continuing late in the night. These tendencies make some of us "night persons"

and   3.________   "morning persons". So if you are a morning person, the best time to exercise for you

would be mornings,   4.________   you feel energetic. However, if you are a night person, who hates to

wake up early, afternoons or evenings will suit you more for exercising.

     If you want to know when is the best time to exercise to burn fat, then mornings are the ideal choice.  

5.________  are mornings considered the best time to exercise for weight loss? There is   6.________  

scientific explanation for that. When a person exercises in the afternoon or in the evening, he is simply

burning the calories coming from   7.________   he has eaten last. But when he exercises on an empty

stomach in the morning, he is burning calories which are stored in the body as fat.   8.________, the best

time to exercise to lose weight is in the morning.

报警系统要求每（）至少测试一次，以测试联网报警系统是否运行正常。

A、一季度

B、一个月

C、半年

D、一年

婚前检查询问个人史时应重点询问（）

A、可能影响生育功能的工作和居住环境

B、与婚育密切关系的遗传性疾病

C、烟酒嗜好、饮食习惯

D、重要脏器和生殖系统疾病及手术史

E、有无流产、早产、死胎、死产等不良孕产史