【单选题】下列因素中,哪项有促进胃运动的作用( )
【单选题】Hill slopes are cleared of forests to make way for crops, but this only ____ the crisis.
【单选题】Hill slopes are____of forests to make way for crops, but this only accelerates the crisis.
【单选题】Hill slopes are ____of forests to make ways for crops, but this only accelerates the crisis.
【单选题】Hill slopes are cleared of forests to make way for crops, but this only ______the crisis.