【单选题】以硫酸铜溶液作电解液,对含有杂质Fe、Zn、Ag的粗铜进行电解精炼.下列叙述正确的是( ) ①粗铜与直流电源负极相连 ②阴极发生的反应为Cu 2+ +2e - =Cu ③电路中每通过3.01×10 23 个电子,得到的精铜质量为16g ④杂质Ag以Ag 2 SO 4 的形式沉入电解槽形成“阳极泥”
【单选题】某公司采用剩余股利政策,假定其目标资本结构为4:3(权益资本:负债资本),计划第二年投资700万元,则应从税后净利中保留( )用于投资,再将剩余利润用于股利发放。
【单选题】OHS laws give workers the right to:
A.
perform any job at the workplace
B.
access all areas of a workplace
C.
to refuse work that is unsafe
【判断题】代号为51316的轴承类型是推力球轴承。
【单选题】下列叙述中,正确的是________。
A.
C++是高级程序设计语言的一种 课本24页 Basic,Pascal,C,C++,Java,VB 都是高级语言
B.
用C++程序设计语言编写的程序可以直接在机器上运行
C.
当代最先进的计算机可以直接识别、执行任何语言编写的程序
【单选题】OHS laws give workers the right to:
A.
to refuse work that is unsafe
B.
access all areas of a workplace
C.
perform any job at the workplace
【单选题】以下关于光纤通信的叙述中,正确的是()
C.
多模光纤的包层外径较粗,而单模光纤包层外径较细;
【单选题】He insisted what he did ________ right and anyone who broke laws _________.
【单选题】By definition, a hard worker is one who "gets right to work" on a given task without delay. Here ,"gets right to work " means_________
A.
gets the work done right
C.
gets the right to work
D.
get to work immediately