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【单选题】
I was feeling tired last night, so I went to bed _______ than usual.A.
early
B.
earlier
C.
late
D.
later
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举一反三
【简答题】What are the two words used to describe the competitive tactics of boys and girls respectively?
【单选题】【杂化轨道】关于π键,下列叙述错误的是
A.
π键能独立存在于不饱和的有机化合物中，例如烯烃
B.
π键是原子轨道以“肩碰肩”形式形成的共价键
C.
π键的电子云呈镜面对称
D.
形成π键的两个原子不能沿键轴自由旋转
【单选题】David and Goliath are names used to describe a situation in which ______.
A.
the two groups are evenly matched in strength
B.
a more powerful group is fighting a less powerful group
C.
a less powerful group is fighting a more powerful group
D.
both of the two groups are losers
【简答题】烯烃的杂化轨道是什么形式?
【简答题】余秋雨在其散文 中提到了“贬官文化”。
【单选题】【4.杂化轨道】关于π键,下列叙述错误的是
A.
π键能独立存在于不饱和的有机化合物中，例如烯烃
B.
π键是原子轨道以“肩碰肩”形式形成的共价键
C.
π键的电子云呈镜面对称
D.
形成π键的两个原子不能沿键轴自由旋转
【简答题】Which two adjectives describe Mark? Which two describe Susan?
【多选题】Which two statements about the Adaptive Services PIC are true? （）
A.
The Adaptive Services PIC supports the Layer 3 service package by default.
B.
The Adaptive Services PIC is required when using the secure shell to access an M-series router.
C.
The Adaptive Services PIC can be configured for the Layer 2 and Layer 3 service packages simultaneously.
D.
The Adaptive Services PIC can be configured for either the Layer 2 or the Layer 3 service package but not both at the same time.
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【简答题】What are the two words used to describe the competitive tactics of boys and girls respectively?
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