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【判断题】
测定控制点平面位置( x 、 y )的工作,称为平面控制测量。A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】______工具一般在编辑矢量曲线时用于调整和移动矢量曲线的锚点和切线，或选取和移动单一对象。
【单选题】患者,男性,52岁,转移性右下腹痛5小时,伴恶心、呕吐、发热。最能提示该患者患有阑尾炎的体征是
A.
移动性浊音
B.
右下腹固定压痛
C.
腹胀明显
D.
肠鸣音减弱或消失
E.
腹肌紧张
【简答题】radio frequency
【单选题】In recent years, satellite television has started to be broadcast in the radio frequency range______.
A.
between 3.4 GHz and 7 GHz
B.
between 12 GHz and 14 GHz
C.
between 14 GHz and 21 GHz
D.
between 21 GHz and 27GHz
【多选题】Bluetooth is a proposed Radio Frequency specification for ()
A.
short range
B.
point-to-multipoint voice
C.
data transfer
D.
modem
【单选题】The transmission time duration of a single pulse of radio-frequency energy is a function of the ().
A.
persistence
B.
pulse repetition rate
C.
pulse length
D.
resolution
【单选题】When can routine communications be resumed on a frequency or channel on which radio silence has been imposed ________．
A.
After determining that the frequency or channel appears to be no longer in use
B.
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C.
After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D.
Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
相关题目：
【单选题】患者,男性,52岁,转移性右下腹痛5小时,伴恶心、呕吐、发热。最能提示该患者患有阑尾炎的体征是
A.
移动性浊音
B.
右下腹固定压痛
C.
腹胀明显
D.
肠鸣音减弱或消失
E.
腹肌紧张