哪些药材可防止冬虫夏草生虫()
A.泽泻
B.藏红花
C.大蒜
D.细辛
E.生姜
参考答案:B
Many trees ________ along the streets every year. So the air is very fresh now.
A.plant
B.are planted
C.planted
D.were planted
焊条电孤焊的烟尘还来源于焊条药皮,如()等产生的有害物质
A.塑料
B.大理石
C.锰铁
D.硅铁