【判断题】合谷穴处浅静脉为手背静脉网的桡侧部分,在穴区的上方走行有手背静脉网桡侧端汇集成的头静脉的起始部。
【单选题】A long time ago, at a national conference on biology, he cautiously ______ his new theory on life.
【判断题】头静脉和贵要静脉分别走行在臂部内侧和外侧。
【简答题】Some of my classmate often ride ____(bike) home.
【单选题】My classmate Evan often helps me _____ my English after class.