题目:
---.We didn’t find the Blacks during the lecture.
--- No one had told them about _____ a lecture.
A.there to be
B.there being
C.there be
D.there was
答案:
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参考答案:D解析:结核分支杆菌为专性需氧,3%~5%CO2能促进生长。营养要求较高,必须在含血清、卵黄、马铃薯、甘油及含某些无机盐类的特殊培养基上才能生长良好。典型菌落为粗糙型,表面干燥呈颗粒状,液体培养...