【单选题】【消耗次数：1】
大肠杆菌在麦康凯琼脂培养基上形成菌落的颜色是？
①
红色
②
无色
③
紫黑色
参考答案：
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【简答题】
增菌培养基
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Controller
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Controller
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Assessor
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participant
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Which of the following is the advantage of pair work?
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It is an ideal way to show materials and do presentations together
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It allows students to work together rather than under teacher’s guidance
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It reinforces a sense of belonging among a group of members
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When all the students are under the control of the teacher
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Teaching aids
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