She was so sad because she failed in the math test. Let's ______ her _______.
A:leave; behind
B:leave; alone
C:leave; aside
D:leave; out
文学常识填空。
《三峡》作者____,当代作家。
273448÷532=( )
一辆执勤的警车停在公路边,当警员发现从他旁边以v=72km/h的速度匀速行驶的货车有违章行为时,警车立即发动起来以加速度a=2m/s2匀加速去追赶.求: