原发性蛛网膜下隙出血有何特点?

（1）小球做直线运动时的频闪照片如图1所示，已知频闪周期T=0.1s，小球相邻位置的间距（由照片中的刻度尺量得）分别为OA=6.51cm，AB=5.59cm，BC=4.70cm，CD=3.80cm，DE=2.89cm，EF=2.00cm．小球在位置A时的速度大小v_A=______m/s；小球运动的加速度大小a=______m/s²．（保留两位有效数字）

（2）在“描绘小电珠的伏安特性曲线”的实验中，用导线a、b、c、d、e、f、g和h按图2所示方式连接好电路，电路中所有元器件都完好，且电压表和电流表已调零．闭合开关后：

①若不管怎样调节滑动变阻器，小电珠亮度能发生变化，但电压表、电流表的示数总不能为零，则可能是______导线断路．

②某同学测出电源和小电珠的U-I图线如图3所示，电源的电动势E=______V，内阻r=______Ω；将小电珠和电阻R串联后接到电源上，要使电路中电流为1.0A，则R=______Ω．

③某同学在实验中还测出a、b、c三种元件的伏安特性曲线分别如图4中的（a）、（b）、）（c）所示，下列说法正确的是______．

A．a可以作为标准电阻使用

B．b能作为标准电阻使用

C．b的阻值随电压升高而增大

D．c的阻值随电压升高而增大．

信息匹配（共5小题；每小题2分，满分10分）

阅读下列应用文及相关信息，并按照要求匹配信息。请在答题卡上将对应题号的相应选项字母涂黑。(选E涂AB,选F涂AC)

阅读下面六款手机的介绍，选出符合各人需求的最佳款式。

Featured phones

A. Nokia-6010

Price: ＄24.99    Color display: Yes     Wireless Internet ready: Yes     

Digital camera: No   2-way text messaging: Yes    Talk time: Up to 330 minutes

Standby time: Up to 240 hours    Weight: 5.08 ounces  

Dimensions: 4.68”×1.97”×0.90”

Games: Backgammon, Bowling, Air glide, and Sky diver plus downloadable Java games

B. Motorola-C650 (Camera phone)

Price: ＄99.99  Color display: Yes     Wireless Internet ready: Yes

Digital camera: Yes 2-way text messaging: Yes  Talk time: Up to 210 minutes

Standby time: Up to 215 hours       Weight: 3.10 ounces    

Games: Downloadable games

C. Samsung-V1660 on Sprint PCS

Price: Free     Color display: Yes          Wireless Internet ready: Yes

2-way text messaging: Yes           Talk time: Up to 204 minutes Standby time: Up to 168 hours

Weight: 3.54 ounces         Memory locations: 200 entry phonebook

D. Motorola-SLVR-L7

Price: ＄206.4  Color display: Yes      Wireless Internet ready: Yes

Digital camera: Yes                 2-way text messaging: Yes  

Talk time: Up to 450 minutes

Standby time: Up to 345 hours       Weight: 3.39 ounces

Dimensions: 4.45”×1.93”×0.45”

Games: Enjoy pre-loaded J2ME games or downloadable games

E. Nokia-8010

Price: ＄124.99   Color display: Yes      Wireless Internet ready: Yes

Digital camera: No          2-way text messaging: Yes  

Talk time: Up to 330 minutes

Standby time: Up to 240 hours       Weight: 4.08 ounces

Dimensions: 3.68”×1.27”×0.70”

Games: Downloadable games

F. Kyocera-SE47 slider on venison wireless

Price: ＄149.99 Color display: Yes Wireless Internet ready: Yes

Digital camera: No                  2-way text messaging: Yes  

Talk time: Up to 210 minutes

Standby time: Up to 100 hours       Weight: 3.39 ounces            Memory locations: 200 entry phonebook

阅读下面信息介绍，并按照要求匹配信息。首先，请阅读下列信息：

61. Susan is at a middle school. Her parents want to buy her a cheaper cellphone without games installed.

62. Mike intends to buy a phone with longer talk time and standby time and it must not be expensive.

63. Jane is at college. She would like to buy a phone which can slide the face up to make a call, and slide it down when you’re done and it has to be light.

64. George would like to have a cheaper phone with digital camera.

65. Tom only buys Nokia. He lost one and he wants to buy another which is smaller.

小题1:. Susan           A. Nokia-6010

小题2:. Mike                 B. Motorola-C650(Camera phone)

小题3:. Jane            C. Samsung-V1660 on Sprint PCS

小题4:. George           D. Motorala-SLVR-L7

小题5:. Tom                E. Nokia-8010

F. Kyocera-SE47 slider on venison wireless

哪种情况不会引起基站系统的VSWR驻波比告警（）。

A.天线内部进水

B.馈线损坏

C.馈线接头未拧紧

D.馈线上接有衰减器

拍摄雨景要用逆光，可以以天空为背景。（）

非定时观测中因缺测或观测、查算有误而造成缺报或编报有错情者，除统计缺报或编报错情外，还应计算缺测或观测、查算的错情。（）