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【简答题】
培养基最的碳源是___,其使用浓度范围在1%~5%,3%。在固体培养时的最方便、最好的凝固剂和支持物是___,一般用量为6~10g/L。
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A.
/ , /
B.
/ , a
C.
the , /
D.
the , a
【单选题】. So before I go any further I want to thank you very much for inviting me to __________ this important conference.
A.
participate in
B.
join to
C.
take part
D.
attend to
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A.
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数量有限
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A.
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A.
价格偏高
B.
比例适宜
C.
口味多样
D.
有一定的糖分
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