第 8 题 第 4 步式中，CV为定容热容量．同时，有
A: [img=281x51]1803613ce171c02.png[/img]
B: [img=297x51]1803613cecb03e4.png[/img]
C: [img=234x51]1803613cf895d3e.png[/img]
D: [img=276x51]1803613d04413a7.png[/img]
A: [img=281x51]1803613ce171c02.png[/img]
B: [img=297x51]1803613cecb03e4.png[/img]
C: [img=234x51]1803613cf895d3e.png[/img]
D: [img=276x51]1803613d04413a7.png[/img]
举一反三
- 已知随机变量X的分布函数为[img=136x49]1803b69024c8270.png[/img] ，则X的均值和方差分别为 A: E(X)=2, D(X)=4 B: E(X)=4, D(x)=2 C: [img=162x43]1803b6902cd8bfb.png[/img] D: [img=162x43]1803b69034d9ffd.png[/img]
- 第10题，第6步系统的定容热容量为 A: [img=158x51]18030cd57a58031.png[/img] B: [img=172x51]18030cd58523b0d.png[/img] C: [img=158x51]18030cd58fda451.png[/img] D: [img=158x51]18030cd59c9281f.png[/img]
- Which of the following propositions is false,set A = {x,x is an integer and[img=60x23]1803a1c6eebb7a3.png[/img]} ? ( ) A: [img=113x25]1803a1c6f77ce06.png[/img] B: [img=139x25]1803a1c7001fe79.png[/img] C: [img=51x22]1803a1c70863f61.png[/img] D: {x|x is an integer and |x| 4}[img=33x22]1803a1c711a7c63.png[/img]
- Which of the following propositions is false,set A = {x,x is an integer and [img=60x23]1803a1c503ffa04.png[/img]} ? ( ) A: [img=113x25]1803a1c50cc3162.png[/img] B: [img=139x25]1803a1c514e60ea.png[/img] C: [img=51x22]1803a1c51dd52ef.png[/img] D: {x|x is an integer and |x| <4} [img=33x22]1803a1c525cf1bd.png[/img]
- 等差数列{ [img=19x25]17da5ffc660c70f.png[/img]}中, [img=46x40]17da5ffc83170d0.png[/img], [img=49x25]17da5ffc9d47486.png[/img]= 4, [img=19x25]17da5ffc660c70f.png[/img]=35,则n为 ( ) A: 52 B: 53 C: 50 D: 51