斯塔夫里阿诺斯认为:“中世纪后期,十分重要的香料贸易并没有受到什么影响,关键问题是,意大利人和阿拉伯人垄断香料贸易引起了其他欧洲人极大的不满,他们热切地寻找能直接抵达东方的途径,以分享这笔厚利。”由此可见,地理大发现的现实原因是()
A. 西欧封建社会商品经济的进一步发展
B. 欧洲对东方商品的渴求
C. 垄断贸易引发激烈的商业竞争
D. 奥斯曼帝国隔断东西方主要商路
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叠加原理是反映()电路基本性质的一个重要原理。
A. 线性
B. 非线性
C. 纯电感
D. 阻容
隐性组织教学又称(),是培训师巧妙地运用表情、身姿等体态语言和各种教学技艺,不留痕迹地控制、转化学员课堂问题行为的组织方式。
What is the mechanism that is used to allocate MAC addresses that are assigned to the VDC for the system MAC address?()
A. NX-OS uses a random MAC address from the IEEE OUI block that is assigned to Cisco.
B. The VDC system MAC is pulled from the active supervisor and concatenated through a hash to ensure uniqueness.
C. NX-OS uses a value that is based on a range that is assigned to the SPROM of the system backplane.
D. The VDC system MAC is based on a range that is allocated to the first line card that is installed in the switch.
饱和盐水钻井液体系,其滤液中的NaCl含量一定要达到饱和,且具有一定的密度,防止岩盐层的塑性变形。
A. 正确
B. 错误