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【单选题】
一个氮原子的大小约为A.
0.1至0.3毫米
B.
0.1至0.3微米
C.
0.1至0.3纳米
D.
0.1至0.3
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反馈参考答案：
举一反三
【单选题】关于生物法除氮过程的说法,不正确的是
A.
先硝化再反硝化
B.
硝化菌是好氧自养菌，反硝化菌是厌氧异养菌
C.
硝化要有足够的碱度，反硝化碱度不能太高
D.
硝化要维持足够的 DO ，反硝化可以低氧也可以无氧
【简答题】国际收支平衡表中的无偿转移不属于经常项目。( )
【多选题】欧洲饮食文化与东方有着很大的差异,需要我们在用餐时多加注意,以下哪些习俗是德国的用餐禁忌()
A.
不得用餐巾扇风
B.
客人可带些小礼物，切记不能送菊花，送花时要注意送单数
C.
忌吃核桃
D.
吃鱼用的刀叉不得用来吃肉或奶酪
E.
吃肉时不要一次将肉全部切开，而应当切一块儿吃一块儿
【单选题】Why there's only one true believer can get the True Scripture?
A.
Because the journey is difficult.
B.
Because there's only one monk.
C.
Because there's only one Scripture.
D.
Because there's only one Wukong
【简答题】经常项目是国际收支平衡表中______的项目，又分为______、______和______三个项目。
【多选题】关于生物法除氮过程的说法,正确的是( )
A.
先硝化再反硝化
B.
硝化菌是好氧自养菌，反硝化菌是厌氧异养菌
C.
硝化要有足够的碱度，反硝化碱度不能太高
D.
硝化要维持足够的DO，反硝化可以低氧也可以无氧
【单选题】Woman: Professor Burnes seems to think there's only one way to write a paper, and that's her way!Man: No kidding? She sure wasn't like that last semester.Question: What can be inferred about Professor...
A.
She didn't require any papers last semester.
B.
She was more flexible last semester.
C.
She grades papers very quickly.
D.
She isn't teaching this semester.
【简答题】A．It's no use explaining the questions to him. B．There's only one point he doesn't understand. C．The question won't be on the exam. D．He doesn't want any help.
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