In the energy range Ev to Ec there are no states.
A: 正确
B: 错误
A: 正确
B: 错误
A
举一反三
- 中国大学MOOC: In the energy range Ev to Ec there are no states.
- There are _____ states in the United States.
- （ ）为摆脱共价键束缚的电子。 A: 导带电子 B: 价带电子 C: Ec -Ev D: Ev -Ec
- （ ）对应共价键的成键电子。 A: 导带电子 B: 价带电子 C: Ec -Ev D: Ev -Ec
- There are 50 stars on the national flag of the United States. They represent today's 50 States of the United States.
内容
- 0
中国大学MOOC: There are ________________ (a number）states in the United States.
- 1
If the K, L, and M energy levels of Pt are 78000 eV, 12000 eV and 30000 eV, respectively, the wavelength of Ka line from Pt is ( )
- 2
The Constitution of the United States of America is the Supreme law of the United States.
- 3
A popular belief______ radio and television have homogenized the language of the United States. A: states that B: that is stated C: that states D: stating that
- 4
There are ______ states in the United States. A: 49 B: 50 C: 51 D: 52