散装水泥车的车种基本记号为“（）”。A、P B、U C、B D、F

女性，38岁。左季肋部被汽车撞伤出现腹痛、恶心、呕吐2小时。查体：T36℃，P120次／分，R22次／分，BP9.3/6.7kPa（70/50mmHg）。意识尚清，面色苍白，四肢发凉。全腹有压痛、反跳痛、肌紧张，肠鸣音弱。B超检查：脾包膜连续性中断，局部回声模糊，脾周及腹腔内可见异常液性暗区。根据患者情况，最确切的诊断是（）。

A.脾破裂并创伤性休克

B.脾破裂并低血容量性休克

C.脾破裂并神经源性休克

D.脾破裂并心源性休克

E.脾破裂并失血性休克

毒物急性毒性常按LD50（）进行分级，可将毒物分为剧毒、高毒、中等毒、低毒和微毒五级。

Thousands of villages in the developing world have no telephones. They have no money to build telephone systems. A new kind of technology may help change this situation. I t reduces the cost of building and using telephone systems.

Traditional systems use wires to carry electrical signals from one telephone to another. The wires often cost much more than telephones. The new system is based on radio communication. Each telephone sends and receives signals through the air, but not through the wires. This reduces the cost greatly. The radio telephone gets their power from the sun.

Each is connected to a solar equipment that changes the sun’s energy into electricity. A battery stores the electricity until someone needs to make or receive a call. The telephone turns off by itself if the level of power in the battery falls too low. This prevents damage to the system. Each radio telephone is connected to a computer microprocessor. It rewards how many calls are sent and received. It controls the power supply.

The technology needs more study, but its new use of radio equipment sun power and computers may help start telephone ringing in the other parts of the world.

68. The radio telephone gets their power from_____.

A. the sun 　　　B. electricity 　　　C. battery 　　　D. a special equipment

69. Each telephone is connected to_____.

A. a solar equipment 　　　　　　　B. a radio machine

C. a computer microprocessor 　　　D. Both A and C

70. From the passage we can infer that_____.

A. the new telephone system costs less than before

B. we can not use the radio as before

C. the new telephone system will take the place of the old one

D. it will be much easier to radio from now on

71. The main idea of the passage is_____.

A. a simple telephone system has been invented and costs less money

B. thousands of villages will use the new telephone system very soon

C. traditional telephone system will become useless

D. the new system will be too good to use

有关IgG，下列哪项是错误的（）

A.是人体最重要的抗体

B.是人血清中含量最高的

C.是唯一能穿过胎盘的抗体

D.是凝集试验中的主要反应抗体

E.是胎盘球蛋白、丙种球蛋白中的主要抗体

【说明】Linux环境下L2TP的配置过程如下：
①从http://www.12tpd.org/download.html上下载12tpd-0.69.tar.gz软件包。
②将12tpd-0.69.tar.gz拷到你所希望的安装目录下(比如：/tmp/目录)。
③解压安装包：
tar-xvzf l2tpd-0.69.tar.gz/*此时会生成一个l2tpd-0.69文件包*/
④编译：
make/*当前目录是/tmp/l2tpd-0.69*/
执行完此命令后，将会在在/tmp/l2tpd-0.69下生成可执行文件l2tpd。
⑤创建L2TPD的配置文件：
mkdir/etc/l2tp
cp/tmp/l2tpd-0.69/l2tpd.conf.sample/etc/l2tp/l2tpd.conf
cp/tmp/l2tpd-0.69/l2tp-secrets.sample/etc/l2tp/l2tp-secrets
cp/etc/ppp/options/etc/ppp/options.l2tp
其中/etc/l2tp/l2tpd.conf配置文件的内容如下：
[global]
port＝1701 auth file＝/etc/ppp/chap-secrets
[lns vpnserver]
exclusive = yes
ip range＝192.168.254.202-192.168.254.210
lac＝0.0.0.0-255.255.255.255
local ip＝192.168.10.1
length bit=yes
require chap ＝ yes
require authentication ＝ yes
name = vpnserver
PPP debug ＝ yes
pppoptfile = /ete/ppp/options.l2tp

【问题4】 可接入的lac的范围是什么