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【单选题】
光波在非均质体中传播时,下列描述不正确的是 。A.
传播速度不因传播发生变化
B.
折射率不止一个
C.
除特殊方向外，均发生双折射
D.
除特殊方向外，一条光线会分解成两条振动方向互相垂直的平面偏光
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反馈参考答案：
举一反三
【简答题】Six Rites are Nacai, Wenming, Naji, Nazheng, Qingqi and____________.
【简答题】脂肪栓塞综合征
【简答题】脂肪栓塞综合征
【判断题】Six Rites are Nacai, Wenming, Naji, Nazheng, Qingqi and Returning to the bride's parents' home.
A.
正确
B.
错误
【单选题】The main duty of the British Privy Council is to .
A.
make decisions
B.
give advice
C.
pass bills
D.
supervise the Cabinet
【单选题】The main duty of the British Privy council is to ___.
A.
make decisions
B.
giving advice
C.
pass bills
D.
supervise the Cabinet
【单选题】What is the main duty of the Preventive Service Task Force?
A.
To make precautions against the spread of disease.
B.
To help public learn about the indicators of disease.
C.
To decide whether some medical checks are necessary.
D.
To judge if the doctors are qualified for what they do.
【判断题】Six Rites are Nacai, Wenming, Naji, Nazheng, Qingqi and Returning to the bride's parents' home.
A.
正确
B.
错误
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