问题
单项选择题
关于气体辐射错误的是( )。
A.气体辐射可当作灰体来计算
B.气体辐射对波长具有选择性
C.气体辐射和吸收在整个容积中进行
D.气体辐射强度的削弱遵守布格尔定律
答案
参考答案:A
解析:[提示] 根据气体的特点知道,气体辐射不能当做灰体来计算。
关于气体辐射错误的是( )。
A.气体辐射可当作灰体来计算
B.气体辐射对波长具有选择性
C.气体辐射和吸收在整个容积中进行
D.气体辐射强度的削弱遵守布格尔定律
参考答案:A
解析:[提示] 根据气体的特点知道,气体辐射不能当做灰体来计算。
用所给动词的适当时态填空。 | |
2. We ________ a room next year, shan't we? 3. He became a teacher three years ago, and now he ________ well. 4. You ________ a student two years ago, right? 5. The teacher asked who ________ the book. 6. They ________ a meeting tomorrow, aren't they? 7. He ________ to his parents when I went to see him last night. |