【判断题】欧姆定律指出,在一个闭合电路中,当导体温度不变时,通过导体的电流与加在导体两端的电压成反比,与其电阻成正比。
【多选题】下述描述中,哪项不是大学生感染上艾滋病病毒的主要原因:
D.
我们没有为大学生提供预防艾滋病病毒的疫苗,致大学生体内缺乏抗体;
【单选题】Would you please _____ us a few minutes?
【判断题】健康定义的最佳描述为具备完整的生理、心理状况和社会适应能力就是健康。()
【多选题】主语和谓语的单复数需要保持一致,以下表达中存在单复数使用错误的有
A.
The infrared spectra of CQDs was tested.
B.
Different method for the synthesis of graphene has been reviewed in this paper.
C.
In the energy-storage sector, electrochemical energy storage based on the reversible conversion of chemical energy and electrical energy has dominated over two centuries.
D.
The quest to explore and to discover novel cathode materials is key to sustaining the progress of Li-ion rechargeable batteries.