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【单选题】
变形杆菌属在普通培养基上菌落特点为A.
菌落大,呈粘液状,相互融合,以接种环挑之易拉成丝
B.
常扩散生长,出现迁徙生长现象
C.
中等大小、圆形、凸起、灰白色、湿润、光滑菌落
D.
圆形、隆起、光滑湿润、不透明,菌落初呈白色,随后因种不同发展成黄色、白色或柠檬色
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皮皮学刷刷变学霸
举一反三
【单选题】When he heard that he was admitted by Qinghua University, he jumped with ________. [ ]
A.
thrill
B.
fright
C.
surprise
D.
terror
【单选题】______the news, he was so shocked as to be speechless.
A.
Heard
B.
Hearing
C.
Hear
D.
Have heard
【简答题】He heard ___________ and caught___________.
【简答题】The first time Luca heard the Island of Inventions, he was very young, but the wonders he heard about sounded so unbelievable to him that they were forever kept in his memory. Since then, he never sto...
【简答题】填入适当的词。 1. I haven't heard from him_______ he went to America. 2.He won't be here_______ he is invited. 3. He will not go to the cinema______ he is very busy. 4. We found the key_______ she had left i...
【简答题】剧本的文字由描述性文字和( )组成。
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