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【单选题】
N2-的键级是A.
3
B.
2
C.
1
D.
2.5
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】How does Chris feel about Ana's decision?
A.
He doesn't want her to take the new job.
B.
He is sad because she wants a new job.
C.
He's happy for her, but he'll miss her.
【单选题】下列哪项对青霉素的描述是错误的( )
A.
为快速灭菌剂
B.
不耐酸，不可口服应用
C.
对敏感菌作用强，对人体毒性小
D.
对 -内酰胺酶稳定
E.
对草绿色链球菌引起的心内膜炎可作为首选药
【单选题】How does Chris feel when the stranger with a fancy car tells him how to become a stock broker?
A.
He feels discouraged.
B.
He feels that everyone looks so happy and asks himself “why I can’t be happy?”.
C.
He feels that other people are not happy.
D.
He feels that other people are not very kind to him.
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