somes questions on classes

<p>Is 18.02 one semester?
If so, what do people usually take Spring of freshman year if they use AP credit for 18.01?</p>

<p>Also, are the 9 credits lost (if one chooses the 18.01A/18.02A road instead of 18.02 off the bat) a big disadvantage in the big picture? I am debating between taking the 18.01A/18.02A road, and just taking 18.02 fall semester. Do many concepts from 18.01 show up in 18.02?</p>

<p>Thanks for the help!!!</p>