问题
单项选择题 A1/A2型题
细菌的合成性代谢产物不应包括（）
A.色素
B.细菌素
C.热原质
D.维生素
E.以上均不是
答案
参考答案：E
解析：色素、细菌素、热原质和维生素均是细菌的合成代谢产物。
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细菌的合成性代谢产物不应包括（）
A.色素
B.细菌素
C.热原质
D.维生素
E.以上均不是
参考答案：E
解析：色素、细菌素、热原质和维生素均是细菌的合成代谢产物。
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| We live in different places. For example, some people live in the mountains; some people live on plains; some people live near water. Mary lives near the sea. The sea is blue. She likes to play on the beach with her friends. Tom lives by a lake. The lake is very big. The water is clear. He often goes boating with his family on fine days. Sometimes he goes fishing with his father on Sundays. Jack lives in the mountains. The mountains are very high. In the summer, it's very cool there. In the winter, the mountains are all white. Jack likes to play in the snow with his sister. Jim lives on a plain (平原). He likes flying kites when the weather is fine. Tony lives in the desert (沙漠). It is very hot and dry. It doesn't get much rain. Tony likes to ride his camel all around. David lives in a forest. The forest has many trees. It rains a lot there. David likes to climb the trees and play in his tree house. | |||||||||||||||||||||
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