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【单选题】
一般认为，食用菌在子实体生长阶段所需的碳氮比以（）为好。A.
30 ～ 40:1
B.
20:1
C.
10:1
D.
5:1
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皮皮学刷刷变学霸
举一反三
【单选题】According to this text, the author is likely to agree that
A.
debt is unavoidable as well as necessary.
B.
a booming economy always follows a debt rise.
C.
more debt has been related to less growth.
D.
debt is reaching its limit to boost economy.
【单选题】It seems unavoidable for him to divorce with his wife.
A.
available
B.
inevitable
C.
consistent
D.
critical
【单选题】Signs of aging are unavoidable, ______ of particular interest to cosmetic companies.
A.
but those that can be disguised are
B.
but those can be disgused are
C.
but that can be disguised is
D.
but all one that can be disguised is
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