皮皮学，免费搜题
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【单选题】
喀纳斯湖成因经历过的剥蚀作用为( )A.
刨蚀
B.
浪蚀
C.
风蚀
D.
侵蚀
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
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【简答题】The word“proper”in the first line of the second paragraph means＿＿＿.
【单选题】Passenger: How much would it cost me to send this parcel to Paris? Operator: That'll be thirty dollars. Passenger: Thirty dollars? ______
A.
What's the next quickest way to New York?
B.
This is a day light delivery.
C.
Okay. Please give me two stamps, also.
D.
Can you lower the price?
【单选题】关于无人机gps天线与遥控器接收机天线说法错误的是?
A.
GPS卫星位置信号
B.
GPS天线一般为定向天线
C.
地面遥控发射机遥控信号
D.
天线的横向.纵向旋转角度均为90°