皮皮学，免费搜题
登录
搜题
【单选题】
现要输送 45m 3 .h -1 的水,若管内水的流速约取 2.5m.s -1 ,则可选 钢管。A.
φ76×3mm
B.
φ88.5×4mm
C.
φ108×4mm
D.
无
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】请利用CNKI一框式检索,检索篇名为“中国情境下政府会计准则执行策略的理论框架构建”,该文作者单位是( )。
【简答题】请利用CNKI一框式检索,检索篇名为“美国政府金融审计主要特色及对我国的启示”的文章,其第一作者为( ),署名作者数共有( )名。
【单选题】听力原文：M：The cell phone is a bit small，isn't it? W：All the cell phones I've ever seen are like that．That's the in thing these days． Q：What does the woman imply? (13)
A.
Cell phones are more convenient when they are smaller.
B.
He should change his thinking and understand that smaller phones are better.
C.
He should accept the fashion.
D.
Cell phones are not worth buying these days.
【单选题】Which of the following types of PV cell is the most efficient?
A.
Amorphous silicon
B.
Organic PV
C.
Quantum dot cells
D.
Monocrystalline silicon
【简答题】PV cell
【单选题】What happens in a PV cell when an incident photon has energy which is greater than the band gap energy?
A.
An electron can jump from the conduction band to the valance band
B.
An electron can move from the valence band to the conduction band
C.
Nothing, the energy must exactly match the band gap energy
D.
The photon is absorbed into the crystal lattice
【简答题】请利用CNKI一框式检索,检索篇名为“美国政府金融审计主要特色及对我国的启示”,下载最高的文章,其第一作者为( ),署名作者数共有( )名。
【单选题】If a PV panel rating is rated at 200 W, what would the expected output power be when the solar irradiance is 200 W?
A.
200 W
B.
100 W
C.
40 W
D.
20 W
相关题目：