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【单选题】
下列关于 s 区元素的性质叙述中,错误的是A.
单质都有很强的还原性
B.
碱金属及钙、锶、钡均可直接与 H 2 作用生成金属氢化物
C.
K 、 Sr 、 Ba 的硝酸盐可用于制作信号弹和烟花
D.
单质均能 溶于液氨生成蓝色的还原性溶液
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举一反三
【单选题】According to the passage, examining the kinds of questions research raises about mobility is______.
A.
not an ideal way to identify his or her disciplinary origin
B.
easier than noting the methods used and the concepts employed
C.
the only way to discern the disciplines he or she applied
D.
too difficult to be used in finding out his or her disciplinary origins
【判断题】Generally speaking, lecture slides as an outline of the content, helpus identify the key topics and concepts in the lecture.
A.
正确
B.
错误
【单选题】According to the passage, examining the kinds of questions a researcher raises about mobility is ______.
A.
not an idem way to identify his or her disciplinary origins
B.
easier than noting the methods used and the concepts employed
C.
the only way to discern the disciplines he or she applied
D.
too difficult to be used in finding out his or her disciplinary origins
【单选题】If the concept is “equations”, the maths teacher will write examples such as “3a+2b=7”,”14b-3=25” which are equations. The examples of”12-8”, “150>125” are not equation. This allows learners to identi...
A.
Role Play
B.
Matching
C.
Provide Examples and Non-Examples
D.
Attribute Classification
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