下载APP
举一反三
【单选题】完成下列各选项 Batteries can power anything from small sensors to large systems． While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are muc...
A.
He teaches chemistry at MU．
B.
He developed a chemical battery．
C.
He is working on a nuclear energy source．
D.
He made a breakthrough in computer engineering．