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【单选题】
通常情况下,分子运动看不见、摸不着,但我们可以通过研究一些看得到的宏观现象来研究它的运动情况,在学习分子运动的理论时,我们通过研究墨水在冷、热水中扩散的快慢可以知道分子运动快慢与温度的关系,这种方法在科学研究上叫做 “ 转换法 ” ,下面是小红同学在学习中遇到的四个研究实例,其中采取 “ 转换法 ” 的是( )
A.
研究物体重力势能大小与高度的关系时，保证物体的质量一定
B.
研究电流时，将电流比做水流
C.
将撬棒抽象为绕固定点转动的硬棒
D.
通过观察电磁铁是否吸引大头针，来判断电磁铁有无磁性
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参考答案：
举一反三
【单选题】下列哪些关于理想与现实的表述是错误的
A.
要辩证看待理想与现实的矛盾
B.
理想的实现具有长期性、艰巨性和曲折性
C.
艰苦奋斗是实现理想的重要条件
D.
现实太残酷，理想永远不可及
查看完整题目与答案
【单选题】My parents are both busy with their work.
A.
忙碌的
B.
空闲的
C.
无聊的
查看完整题目与答案
【单选题】If two parents are both left-handed, the possibility that their children will also be left-handed increases.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【判断题】Jobs' adopted parents are both college graduates
A.
正确
B.
错误
查看完整题目与答案
【单选题】和Windows操作系统捆绑在一起的浏览器软件是( )。
A.
InternetExplorer浏览器
B.
360浏览器 6
C.
Navigator浏览器
D.
Firefox浏览器
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【判断题】地下茎的变态由叶状茎、刺状茎、钩状茎、鳞茎、块茎等组成。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Pamela is a young mother whose parents are both deceased. Assuming that disease X is a genetic disorder with either a dominant or a recessive inheritance pattern, which of the following statements is ...
A.
If neither of Pamela’s parents ever had disease X, then Pamela does not and never will have disease X.
B.
If neither Pamela nor the father of Pamela’s child has disease X, then that child will never have disease X.
C.
If both of Pamela’s parents had at least one copy of the disease X gene,then Pamela also has at least one copy of the disease X gene.
D.
If neither of Pamela’s parents ever had disease X, but Pamela has disease X,then disease X is not a dominantly inherited genetic disorder.
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【单选题】My parents are both busy with their work.
A.
父亲
B.
母亲
C.
父母亲
D.
祖父母亲
查看完整题目与答案
【单选题】Your parents are both teachers, ______ they? [     ]
A.
are
B.
aren't
C.
do
D.
don't
查看完整题目与答案
【单选题】The girl with her grandparents for the moment because her parents are both very busy this month.
A.
lived
B.
is living
C.
live
D.
was living
查看完整题目与答案
相关题目：
【单选题】下列哪些关于理想与现实的表述是错误的
A.
要辩证看待理想与现实的矛盾
B.
理想的实现具有长期性、艰巨性和曲折性
C.
艰苦奋斗是实现理想的重要条件
D.
现实太残酷，理想永远不可及
查看完整题目与答案
【单选题】My parents are both busy with their work.
A.
忙碌的
B.
空闲的
C.
无聊的
查看完整题目与答案
【单选题】If two parents are both left-handed, the possibility that their children will also be left-handed increases.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【判断题】Jobs' adopted parents are both college graduates
A.
正确
B.
错误
查看完整题目与答案
【单选题】和Windows操作系统捆绑在一起的浏览器软件是( )。
A.
InternetExplorer浏览器
B.
360浏览器 6
C.
Navigator浏览器
D.
Firefox浏览器
查看完整题目与答案
【判断题】地下茎的变态由叶状茎、刺状茎、钩状茎、鳞茎、块茎等组成。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Pamela is a young mother whose parents are both deceased. Assuming that disease X is a genetic disorder with either a dominant or a recessive inheritance pattern, which of the following statements is ...
A.
If neither of Pamela’s parents ever had disease X, then Pamela does not and never will have disease X.
B.
If neither Pamela nor the father of Pamela’s child has disease X, then that child will never have disease X.
C.
If both of Pamela’s parents had at least one copy of the disease X gene,then Pamela also has at least one copy of the disease X gene.
D.
If neither of Pamela’s parents ever had disease X, but Pamela has disease X,then disease X is not a dominantly inherited genetic disorder.
查看完整题目与答案
【单选题】My parents are both busy with their work.
A.
父亲
B.
母亲
C.
父母亲
D.
祖父母亲
查看完整题目与答案
【单选题】Your parents are both teachers, ______ they? [     ]
A.
are
B.
aren't
C.
do
D.
don't
查看完整题目与答案
【单选题】The girl with her grandparents for the moment because her parents are both very busy this month.
A.
lived
B.
is living
C.
live
D.
was living
查看完整题目与答案
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