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【多选题】
以下情形可产生多普勒效应A.
接收器运动，波源静止
B.
接收器静止，波源移动
C.
波源和接收器同时运动
D.
波源和接收器同时静止
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【简答题】单词拼写。 1. At that time my parents couldn't afford the ______(船费) to the United States. 2. _______(不像) most people in the office, I don't come to work by car. 3. How long do you often spend _______(聊天) ...
【简答题】设某计算机存储器字长 32 位,按字编址,主存容量为 16MB , cache 的容量为 16KB ,每块 8 个字。主存和 cache 之间的地址映像采用 4 路组相联映像(即 cache 每组 4 块),试完成以下问题。 ( 1 )主存地址由高到低被划分成___、____和___三部分,它们的宽度分别是___、____和___位; (2)cache地址由高到低被划分成___、____和___三...
【简答题】My parents couldn't afford to pay for my living ______, so I have to work part time. (expense /congratulate /association /resort /odd)
【单选题】My parents couldn't get into the house last night because _______ of them had the key. (2016)
A.
either
B.
all
C.
both
D.
neither
【简答题】At one time, I even felt my parents couldn't understand me so I hoped I could be_______(freely)from them.
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