Kỉ niệm về thầy cô và mái trường

23. public and private investment in infrastructure include all of the following except a) worker knowledge and skill development b) telecommunication systems, internet provider systems, and power distribution systems c) highways, transit systems, airports, harbors, and educational facilities d) fire departments, police departments, and public safety systems e) water systems, wastewater treatment systems, and navigational systems

The career field ensures that facilities and equipment run smoothly.

While aphorisms and epigrams both express a truth about life, an epigram usually has a a. humorous tone b. serious tone c. grave tone d. eclectic tone