皮皮学，免费搜题
登录
搜题
【单选题】
弗莱明发现青霉素是由于观察到在产霉菌菌落周围不见有细菌生长,而再深入研究创造奇迹的。这是人类首次观察到并利用的微生物之间的A.
寄生关系
B.
捕食关系
C.
拮抗关系
D.
共生关系
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】关于肌组织的再生,下列哪项描述是错误的?
A.
肌组织的再生能力很弱
B.
横纹肌组织损伤后可以完全再生
C.
平滑肌细胞有一定的再生能力
D.
心肌细胞损伤后多由瘢痕组织修复
E.
肌组织损伤后只能由瘢痕组织修复
【单选题】Only when he left home ______ how much he loves his parents. [ ]
A.
did he know
B.
had he know
C.
he knew
D.
he had knew
【单选题】As a wise department manager, he possesses a unique way to ______ huge tasks into small and doable units.
A.
break through
B.
break away
C.
break off
D.
break down
【单选题】What did the man want to know?
A.
He wanted to know where they were.
B.
He wanted to know what was in the sky.
C.
He wanted to know why the sky was strange.
【单选题】I didn’t know the answer to the question and _________.
A.
so did he
B.
he did either
C.
neither did he
【单选题】The author did not know exactly when he was born because
A.
he did not know who his mother was.
B.
there was no written evidence of it.
C.
his master did not tell his father.
D.
nobody on his farm knew anything about it.
【简答题】—What did he say? —I don’t know what________. A．did he say B．he says C．he has said D．he said
相关题目：
参考解析：
知识点：
题目纠错 0
发布
