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【单选题】
下列溶液中能够区别SO2和CO2的是( ) 1石灰水 2H2S溶液 3KMnO4溶液 4氯水 5品红溶液 A.123 B.234 C.除1以外 D.全部
A.
B.
C.
D.
D
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举一反三
【单选题】人类的语言频率范围为( )。
A.
20~20000赫兹
B.
500~2000赫兹
C.
3000~8000赫兹
D.
20000赫兹以上
【单选题】人类语言的总频率范围为()。
A.
300~3400Hz
B.
80~8000Hz
C.
34~3400Hz
D.
300~8000Hz
【多选题】现场验收时从物理层面上对整个网络工程的布线情况进行验收,包括( )。
A.
工作区子系统
B.
配线子系统
C.
干线子系统
D.
设备间管理间布线情况
【单选题】听力原文: 'Damage is expected to total into the tens of millions of dollars after several days of flooding in south central Alaska. But it's believed no one has been hurt.' Tim Wolston, of member station ...
A.
Southeast of Anchorage.
B.
South of Anchorage.
C.
Southwest of Anchorage.
D.
East of Anchorage.
【简答题】电脑故障维修基本原则:1.( );2.( );3.( )。
【单选题】以下对可耐受最高摄入量(UL)的解释,哪项是错误的( )
A.
是平均每日可以摄入某种营养素的最高量
B.
这个量对一般人群几乎所有个体都不至于损害健康
C.
主要用途是检查个体摄入量过高的可能,以避免发生中毒
D.
是健康个体的营养素摄入目标
E.
.UL包括饮食、强化剂、添加剂等各种营养素来源之和
【单选题】听力原文: Business and public organizations spend tens of millions of dollars each year on development programs to improve their managers' interpersonal skills. You'd think, therefore, that there would be...
A.
Human relations.
B.
Personality.
C.
Interpersonal skills training.
D.
Interpersonal competence.
【单选题】Manufacturers spend millions of dollars on advertising to entice people to buy their products.
A.
entertain
B.
encounter
C.
tempt
D.
force
【判断题】常用导线的线芯有单股、7股和19股多种,连接方法随芯线的股数不同而异。( )
A.
正确
B.
错误
【单选题】'We're not bringing in millions of dollars,' says a director of development. 'But we want to make sure the demand is there before we act to the project.'
A.
of
B.
off
C.
on
D.
for
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