什么叫菌丝?霉菌菌丝有哪些类型?霉菌细胞壁由哪些成分构成?
参考答案:
菌丝:霉菌的营养体,呈丝状结构。无隔菌丝和有隔菌丝。几丁质层,蛋白质层,葡聚糖蛋白网层。
When she first arrived in China, she wondered what the future might have ____ for her, but now
all her worries are gone. [ ]
A. in need
B. in time
C. in preparation
D. in store
抑郁发作的诊断标准中包括()
A.兴趣丧失,思维散漫,精力减退或疲乏感,自我评价过低,性欲减退
B.兴趣丧失,无愉快感,思维贫乏,自我评价过低,性欲减退
C.兴趣丧失,无愉快感,精力减退或疲乏感,自我评价过低,性欲减退
D.兴趣丧失,被控制感,精力减退或疲乏感,自我评价过低,性欲减退
E.兴趣丧失,无愉快感,精力减退或疲乏感,自我评价过低,凭空闻声