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课后习题:3-4,3-5,3-6,3-7,3-13,3-16
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举一反三
【简答题】按照有效数字的运算规则,下列计算式的结果各应包括几位有效数字:(1)213.+4.402+0.3244 位;(2) 位;(3)pH=0.03求H + 浓度 位
【单选题】A paper published in Physics Today challenges how physics is taught and states that teaching fails to reveal the of our understanding.
A.
limitation
B.
boundary
C.
limits
【单选题】按照有效数字运算规则 , 下列算式结果应保留几位有效数字 ? [0.1000×(25.00-1.52)×246.47÷(1.0000×1000)]
A.
3位
B.
5位
C.
4位
D.
不确定
【简答题】按照有效数字的运算规则，下列计算式的结果应保留几位有效数字：213.+4.402+0.3244应保留______位； 0.1000×(25.00-1.52)×(246.47/1.000)×1000应保留______位
【简答题】完形填空。 Sometimes I really doubt whether there is love between my parents.They are very busy working to _1 the family.They don't act in the _2_ ways that I read in books or I see on TV. _3_ flowers to e...
【简答题】按照有效数字运算规则,下列算式213.+4.402+0.3244的计算结果应包括________位有效数字。
【单选题】In the long run, products fail because of a poor match between which of the following?
A.
a. advertising and personal selling
B.
b. limited resources and unlimited consumer wants
C.
c. product characteristics and consumer needs
D.
d. prices and consumer demand
【简答题】按照有效数字的运算规则，下列计算式的结果各应包括几位有效数字?
【单选题】To be well fit for the job, _____. [ ]
A.
a good knowledge of physics is needed
B.
one needs to have a good knowledge of physics
C.
it is required that one should have a good knowledge of physics
D.
a good knowledge of physics is important
【简答题】Unfortunately, she is _____________ to penicillin, and I doubt whether any other drug will help her. 不幸的是,她对青霉素过敏,我不能确定是否有其他药物可以帮助她。 I am ____________ of the suffering you are undergoing. 我清楚你正在经历的痛苦。
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