片剂包糖衣时打光时应选用的辅料为( )
A.胶浆和滑石粉B.糖浆和滑石粉C.糖浆D.虫胶E.虫蜡
参考答案:E
赤眼蜂是松毛虫的天敌,在发生松毛虫的森林里可以通过释放赤眼蜂来控制松毛虫的危害,这种防治方法是____________。
The speed of cars and trucks is ________ 30 kilometers per hour in large cities in China.
A.limited
B.limiting
C.limiting to
D.limited to