在兰花组织培养中，原球茎球状体继代培养必须采用完整的球状体。
参考答案：错
Hiking by oneself can be fun and good for health. It may also be good for ________ building. [ ]
A. respect
B. friendship
C. reputation
D. character
以下叙述错误的是（）。
A.所出为井
B.所溜为荥
C.所灌为输
D.所行为经
E.所入为合
