经皮肤感染的绦虫是().
A.猪囊尾蚴
B.细粒棘球绦虫
C.曼氏迭宫绦虫的裂头蚴
D.阔节裂头绦虫
E.牛带绦虫
参考答案:C
Edison ________ one of the greatest inventors in the world
A. thinks to be B. is still thought to be C. thought to be
若用10mm厚的钢板卷制一个外径为600mm的圆筒体,其展开下料长度L=______mm。
A.(600-5)π
B.(600-10)π
C.(600+5)π