Answer:A 4、What is the 16th letter of the English alphabet? A、N B、O C、P D、Q Answer:C 5、Who created the C++ programming language? A、Bjarne Stroustrup B、Bill Gates C、John Backus D、Niklaus Wirth Answer:A 6、The trachea is ___ to the esophagus. A、postenor B、interior C、...