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【单选题】
下列化合物手性碳原子构型为 S 的是( )。
A.
a
B.
b
C.
c
D.
d
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参考答案:
举一反三
【单选题】The author believes that ______.
A.
the results obtained in the laboratory exactly reflects the real-life situations
B.
the gap between the laboratory studies and real-life situations is too large to fill up
C.
the gap between the laboratory studies and real-life situations can be closed by proper reasoning
D.
the difference between the laboratory studies and real-life situations will be reduced
【单选题】对于仪表来说,下列哪个说法是正确的( )。
A.
大多数车都有发动机转速表
B.
大多数车都有电流表
C.
大多数车都有车速表
【单选题】艾瑞克森认为老年人面临的主要心理社会危机是()
A.
自主对自我怀疑
B.
亲密对疏离
C.
再生对停滞
D.
自我实现对悲观失望
【单选题】【C16】
A.
apartment
B.
department
C.
control
D.
laboratory
【简答题】A special laboratory at the University of Chicago is busy only at night. It is a dream laboratory where researchers are at work studying dreamers. Their findings have discovered that everyone dreams f...
【单选题】在剪力为零截面上,弯矩一定为
A.
最大值
B.
最小值
C.
极值
D.
正应力和切应力均为零
【单选题】多数有机化合物不具备的共性特征的是:
A.
易溶于水
B.
容易燃烧
C.
熔沸点较低
D.
热稳定差
【单选题】在剪力为零截面上,弯矩一定为
A.
最大值
B.
最小值
C.
极值
D.
【单选题】The author believes that ______.
A.
the results obtained in the laboratory exactly reflects the real-life situations
B.
the gap between the laboratory studies and real-life situations is too large to fill up
C.
the gap between the laboratory studies and real-life situations eau be closed by proper reasoning
D.
the difference between the laboratory studies and real-life situations will be reduced
【单选题】对于仪表来说,下列说法哪个是正确的()
A.
大多数车都有发动机转速表
B.
大多数车都有电流表
C.
大多数车都有机油压力表
D.
大多数车都有车速表
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