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【单选题】
元素周期律的提出是化学发展史上的一个里程碑,提出元素周期律的科学家是A.
卢瑟福
B.
波意尔
C.
门捷列夫
D.
道尔顿
E.
波尔
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皮皮学刷刷变学霸
举一反三
【单选题】The word 'amorist' most probably means someone who ______.
A.
travels in a foreign country
B.
writes loving stories
C.
makes pretty presents
D.
draws beautiful pictures
【单选题】a consultant
A.
someone who talks at a public event
B.
someone who helps people to improve at a sport, skill or school subject
C.
someone who advises people on a particular subject
D.
someone who writes books or articles
【单选题】When someone writes with ______ ink, only those people who have a special ilquid solution can bring the writing into view to discover the meaning of the message.
A.
consistent
B.
reflex
C.
obvious
D.
invisible
【单选题】If someone writes a book about teaching languages, who are their target readers?
A.
language teachers
B.
language learners
C.
language writers
【多选题】负荷计算的方法宜按下列原则( )选取。
A.
用电设备台数较多，各台设备容量相差不悬殊时，宜采用需要系数法
B.
用电设备台数较少，各台设备容量相差悬殊时，宜采用二项式法
C.
在方案设计阶段可采用单位指标法
D.
在初步设计及施工图设计阶段，宜采用需要系数法
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