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【单选题】
利用中国知网进行单一检索词检索,选择主题检索与关键词检索,输出的结果数量一定是()A.
主题检索命中数量多
B.
没区别
C.
关键词检索命中的文献信息数量更多
D.
不一定
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】Which activities does the GR officer suggest?
A.
Go shopping in the Ginza
B.
Visit Ueno Park
C.
Go shopping in Shibuya
D.
Spend time in Shinjuku Park
E.
Watch a show at Hibiya Theatre
F.
Visit the Imperial Palace
G.
Watch a show at Kabuki-za Theatre
【单选题】Which of the following statements is true according to the passage? ______
A.
The ancient Greeks could explain the natural wonders.
B.
It was an American Indian woman who put these stories in books.
C.
Nowadays, we still use these 'why' stories to explain the natural wonders.
D.
Today we read these 'why' stories only for fun.
【单选题】声速失真伪像可由于实际声速差别过大引起，超声表现为声速失真、测量误差。下列哪项最显著?
A.
肝、脾超声测量
B.
巨大囊肿或脓肿超声显示和测量
C.
巨大脂肪瘤的超声显示和测量
D.
巨大子宫肌瘤超声显示和测量
E.
子宫大小的超声显示和测量
【单选题】声速失真伪像可由于实际声速差别过大引起，超声表现为声速失真、测量误差。下列哪项最显著
A.
肝、脾超声测量B．巨大囊肿或脓肿超声显示和测量
B.
巨大脂肪瘤的超声显示和测量
C.
巨大子宫肌瘤超声显示和测量
D.
子宫大小的超声显示和测量
【单选题】The passage suggests which of the following about global corporations?
A.
Their continued growth depends on the existence of a fully integrated international market.
B.
Their potential effect on the world market is a matter of ongoing concern to international institutions.
C.
They will have to assume quasi-governmental functions if current economic trends continue.
D.
Their influence on world economics will continue to increase.
【简答题】三极管的结构和类型包括两类: 和PNP型。
【单选题】声速失真伪像可由于实际声速差别过大引起，超声表现为图像失真、测量误差。下列哪项最显著
A.
肝脾超声测量
B.
巨大囊肿或脓肿超声显示和测量
C.
巨大脂肪瘤的超声显示和测量
D.
巨大子宫瘤超声显示和测量
E.
于宫大小的超声显示和测量
【单选题】声速失真伪像可由于实际声速差别过大引起,超声表现为声速失真、测量误差。下列哪项最显著
A.
减低滤波频率
B.
减低测速度的速度标尺,增大取样框
C.
屏住呼吸,提高滤波频率
D.
降低速度标尺
E.
深呼吸,提高速度标尺
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