在国际单位制的基本单位中，质量计量单位的名称和符号分别是( )。
A. 克；g
B. 千克；Kg
C. 千克(公斤)；kg
D. 克；G
查看答案
为给定量值按给定规则确定的一组基本单位和导出单位，称为( )。
A. 数值单位制
B. 特定单位制
C. 计量单位制
D. 量值单位制
It can be inferred from the passage that economic theory as it presently stands would most likely apply to which of the following situations
A parliamentary system, where senior members vote by secret ballot.
B. An arts guild, where voting authority is determined by the level of skill at a craft.
C. A fan club, where a president elects other members of the club.
D. A board of trustees group, where all members vote to make company decisions. E) A monarchy, where a king consults his vassal lords before making decisions.
CATALYZE:
A. cultivate
B. restrain
C. calm
D. corrupt
E. contort
一般用的20个SI词头，所代表的因数的覆盖范围为( )。
A. 10-5～105
B. 10-12～1012
C. 10-24～1024
D. 10-36～1036
微信支付 
支付宝支付