AN73-AN81代表什么螺栓？（）

A . 100 B . 200 C . 300 D . 1000

A . 压缩机 B . 汽轮机 C . 全损耗系统 D . 主轴、轴承和离合器

A . 正确 B . 错误

A . N1＞N B . N1＝N C . N1＜N D . 视具体情况而定

A . A.具有相同的直径。 B . B.具有相同的长度。 C . C.拉伸强度相同，而剪切强度不同。 D . D.拉伸强度不同，但剪切强度相同。

A . A.直径为10／16英寸，长度为9／16英寸的带槽扁圆头螺栓。 B . B.直径为9／16英寸，长度为1英寸的带槽扁圆头螺栓。 C . C.直径为9／16英寸，长度为5／8英寸的带槽扁圆头螺栓。 D . D.直径为10／16英寸，长度为5/16英寸的带槽扁圆头螺栓。

A . 喷油泵基本尺寸喷油泵；喷油泵 B . 喷油泵；喷油泵基本尺寸 C . 喷油泵；合成式喷油泵 D . 喷油泵柱塞直径；合成式喷油泵

A . 铜材质 B . 不锈钢材质 C . 锌合金材质 D . 铝材质

A . A.直径5/16英寸，长度3/8英寸，尾部有孔的钢螺栓。 B . B.直径5/16英寸，长度3/8英寸，尾部有孔的2024铝合金螺栓。 C . C.直径3/16英寸，长度5/8英寸，尾部无孔的钢螺栓。 D . D.直径3/16英寸，长度5/8英寸，尾部无孔的2024铝合金螺栓。

A . A.铆钉头形状代号。 B . B.铆钉的材料代号。 C . C.铆钉的直径代号。 D . D.铆钉的长度代号。

A . 直径是1/4英寸 B . 材料是不锈钢 C . 直径是7/8英寸 D . 材料是7075

A . 喷油泵基本尺寸喷油泵 B . 喷油泵 C . 合成式喷油泵 D . 调速器及输油泵的装置代号

A . 正确 B . 错误

A . A.AN3-AN20通用螺栓可以承受拉伸载荷，不能承受剪切载荷。 B . B.小于AN3的铝合金和合金钢螺栓不能用在飞机结构上。 C . C.AN3-AN20通用螺栓可以承受剪切载荷，不能承受拉伸载荷。 D . D.合金钢螺栓和螺帽不能用在因维护检查需要反复拆卸的部位。

But complaints have steadily grown about a law that came with the spending bill. The Real ID Act of 2005 established national standards for driving licences. By 2008, it said, every state would have to make sure its licences included "physical security features" and "a common machine readable technology". A state would be responsible for verifying that anyone applying for licences is in America legally. Only licences that met the new standards would be accepted by the federal government. An American who wanted to fly commercially, or do anything else for which he needed to identify himself, would end up in a queue at the Department of Motor Vehicles. The idea was to make life harder for would-be terrorists. But the scheme will certainly make life harder for the states. The Department of Homeland Security (DHS) reckons that implementing the changes will cost states up to $14.6 billion, with individuals on the line for an additional $8.@5 billion. And the federal government plans to meet only a fraction of the cost. Critics also argue that the new licences will amount to national identification cards and will contain ton much information about the bearer. Immigration advocates say that the Real ID Act unfairly targets illegal immigrants. And from a security standpoint the act raises as many fears as it allays. Licences that meet the revised standards would be rich of sensitive data. They might prove irresistibly tempting to identity thieves and marketing firms. On January 25th Maine became the first state to oppose the Act. Its legislature passed a resolution refusing to implement the Real ID Act with nearly unanimous support. On March 8th, Idaho approved a similar bill. Two dozen other states have measures pending that question the act or oppose it outright. On March 1st the DHS issued guidelines for implementing the Real ID Act that manage to ignore most of these objections. The guidelines allow states a bit more time to implement the act. But they give no quarter on the expensive physical security features and suggest that states deal with privacy concerns on their own. And as the National Governors Association promptly noted, they "do nothing" to address the cost to states. Which of the following consequence might be caused by the 2005 emergency spending bill？ A．financial support to the construction of international aid groups. B．an act that has brought to great disputes among different states. C．prohibitions of US citizens to take commercial flights. D．against humanitarian aid to countries that were attacked by the Asian tsunami.

A．干式自冷 B．干式风冷 C．油浸自冷

A．干式白冷 B．干式风冷 C．油浸自冷

A．压缩机 B．汽轮机 C．全损耗系统 D．主轴、轴承和离合器

A．铜线与铝线绞接 B．铝线与铝线绞接 C．铜铝过渡接头压接