配制I2标准溶液时，加入KI的目的是增大I2的溶解度以降低I2的挥发性和提高淀粉指示

货车车体外胀的原因是什么？有什么危害？

某同学想用以下器材组装一只欧姆表，并测量一只约几千欧电阻的阻值。

A 电流表，满偏电流为1mA，内阻为20Ω

B 电流表，满偏电流为0.6A，内阻为5Ω

C 电动势15V，内阻5Ω的直流电源

D 电动势3V，内阻3Ω的直流电源

E 最大阻值为5000Ω的滑动变阻器

F 最大阻值为100Ω的滑动变阻器

（1）以上器材应选用___________（填字母）；

（2）当欧姆表的表笔短接时，发现表指针没指到满偏，而是超出，则应将变阻器的阻值调___________（填“大”、“小”或“不变”），欧姆表调零后，滑动变阻器被接入部分的阻值为___________Ω；

（3）若用此欧姆表测量电阻，发现指针指在满偏电流的三分之一处，则此电阻的阻值约为___________Ω。

股票和债券都是信用货币。( )

The UNIX operating system is made up of three parts; the kernel, the shell and the programs. The kernel of UNIX is the (71) of the operating system: it allocates time and memory to programs and handles the filestore and communications in response to (72) .
The shell acts as an (73) between the user and the kernel. When a user logs in, the (74) program checks the username and password, and then starts another program called the shell. The shell is a command line (75) (CLI). It interprets the commands the user types in and arranges for them to be carded out. The commands are themselves programs: when they terminate, the shell gives the user another prompt (% on our systems).

A．interface

B．interconnect

C．changer

D．boundary

赢得谈判的重要一环是善于控制谈判的（）

A.对象

B.进程

C.时间

D.议题