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【多选题】
人们听到的声音是由物体振动产生的，它的频率在 范围内。超过 称为超声波，低于 称为次声波A.
20Hz---20KHz
B.
20KHz
C.
20Hz
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举一反三
【单选题】Once upon a time, innovation at Procter & Gamble flowed one way: from the United States outward. While the large Cincinnati based corporation was no stranger to foreign markets, it usually sold them p...
A.
Procter & Gamble has to change its one-way flow tradition because of the increased number of its foreign managers.
B.
In spite of market changes, Procter & Gamble still sticks to its longstanding tiadition of one way flow innovation.
C.
The brands of Pampers, Crest, Ariel, and Cinch reflect the one-way flow tradition of Procter Gamble.
D.
Today one may meet more foreign faces in Procter & Gamble than years ago.
【简答题】一批精密仪表在大连机场海关申报出口并转关运输至北京朝阳口岸出境，其出口货物报关单“出口口岸”栏应按实际申报海关所在地填为“大连机场”。
【简答题】Los habitantes principales son los_______.
【单选题】According to the passage, Procter & Gamble hopes to transplant the foreign idea back to its home territory because ______.
A.
Americans are more likely to buy foreign-made products than before
B.
for most Americans foreign products are much more attractive than home-made ones
C.
the company has found that foreign-made products are superior to home-made ones in terms of quality
D.
the company has hired more foreigners in its top management than before
【简答题】调整转向盘的自由行程后，出现转向沉重，但转向盘的自由行程量却仍很大，则说明转向螺杆的轴向间隙过大，应调整轴承的（）。
【单选题】CD8+ 效应 CTL 细胞产生免疫效应的作用方式是 :
A.
释放 IL-2 、 IFN- γ、 TNF- β等细胞因子， 产生炎症反应
B.
调理作用
C.
释放穿孔素溶解破坏靶细胞
D.
ADCC 作用
【简答题】电路的运行状态一般分为 、 、 。
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