电网频率超出（）赫兹为事故频率。 A.50±0.5 B.50±0.3 C.50±0.

More and more families go on a car trip each year. 小题1:H_______, the thought of trouble on the road may prevent you from going out. To avoid(避免) trouble, you need to make a careful小题2:p_______ for your trip.

First of all, choose a proper route for your trip. Consider 小题3:w_______ you are going and find several possible routes to it. Traffic and the 小题4: t_______ that you will spend on the road must be considered when you decide one.

Consider your luggage(行李) needs.小题5:B_______ you begin packing your necessities(必需品), think about how many people will be in your car and how much space they will need in order to 小题6: t_______ comfortably.

Try to avoid busy times. Usually highways are busier on Fridays and Sundays, so going on Tuesday or小题7:T______ will help you to avoid traffic jams. Driving at night is also a great way to miss the traffic and the kids can sleep小题8: d_______ the trip.

小题9:F_______, don’t forget to check your car carefully before leaving so that you can have a 小题10:s_______ trip.

患者男性，70岁。咳嗽2月，痰少，经口服抗炎及止咳药等对症处理无好转。近1周来出现发热，伴左侧胸痛。嗜烟，每日吸30支。体检：T：39℃，P：96次/分，R：22次/分，Bp：150/90mmHg，浅表淋巴结未触及，心脏正常，左下胸背部可闻少许湿啰音。

检查提示：经一般处理后，体温恢复正常。Hb：13g/L，WBC：8×10⁹/L，N：0.70，L：0.30，硫酸锌浊度10u，GPT：38u以下。肌酐4mg/dl，尿素氮29mg/dl，心电图正常。根据检查结果应选择哪些治疗（）

 

A.COAVP16

B.COCM

C.DDP、V-P16（顺氯铵铂、足叶乙甙）

D.COPE-M

E.左全肺切除

F.青霉素

已知关系R和S见表13-15、表13-16，则关系S是关系R经过下列( )的结果。
表13-15 R

学号	姓名	性别	年龄	所在系
99001	张明娩	女	20	CS
99002	刘红	女	18	TR
99004	陈列	男	19	CS

　　　　　　　　　表13-16 S

学号	姓名
99001	张明娩
99002	刘红

A．连接运算

B．选择运算

C．投影运算

D．除运算

简述周代帝王冕服的构成。

以下哪些属于村农业普查工作组的任务（）

A.做好本村农业普查宣传工作

B.对本普查区所有住户、农业生产经营单位进行摸底

C.负责收集本普查区户籍名录、土地承包合同、外来人员暂住登记等资料

D.编制《住户摸底表》和《单位摸底表》，绘制普查小区示意图