皮皮学，免费搜题
登录
搜题
【多选题】
镜头的种类可以包括()。A.
标准镜头
B.
广角镜头
C.
远摄镜头
D.
变焦镜头及特殊用途镜头
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Traditional Radio Frequency Identification was ____.
A.
less efficient than the new smart tags
B.
harder to produce than the new smart tags
C.
more expensive than the new smart tags
【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
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