下列码长可变的码是（）
A.OVSF码
B.scrambling码；
C.midamble训练序列码；
D.同步码SYNC_DL；
参考答案：A
She kept_____playing computer games the whole time, which resulted____her failure in the exam.
A．up; from
B．on; from
C．up; in
D．on; in
