货运机动车超过核定载质量可处以（）以下的罚款。
A、500元
B、300元
C、800元
参考答案：A
Research has been limited to ____ production profits, rather than ____ that GM foods are safe.
A．increasing; make sure
B．increasing; making sure
C．increase; make sure
D．increase; making sure
在Excel2003中，编辑工作表要先打开工作簿。
