【填空题】在Windows 7系统中，在任意对象上单击鼠标右键，可以打开该对象的（）。

【填空题】7、代数系统<a,*>中，|A|>1，如果分别为<a,*>的幺元和零元，则的关系为 。

【填空题】7、公式化简为 。

【填空题】7-2 图中笔筒需要使用（）复合材质来完成。

【填空题】AV Clip 7: traffic and Heart AttackAV 7 Traffic and Heart Attack.mp4 Watch the video clip three times and complete the following passage by filling in each blank with the word from the video clip. There is no question Americans are spending large amounts of their time these days sitting in traffic. More than 120 million people (1) _________ to work by car each day and most of them spend at least 30 minutes on the road. But is always in the car (2) _______ our health? New research from Germany finds exposure to traffic may help (3) ______ heart attacks in people already at risk. They interviewed more than 1,400 patients to determine what type of events immediately (4) ______ heart attack symptoms. Results show that patients were three times more likely to have been driving a car, riding public (5) ________ or riding a bicycle near traffic within an hour of their heart attack than doing any non-traffic activities. Women appeared more (6) ________ than men. Their heart attack risk was five times greater when exposed to traffic. Researchers say they are still not sure how traffic may (7) ______ to heart attacks, but they theorize that a combination of stress and heightened pollution may be to (8) _________.

【填空题】AV Clip 7: Excessive SaltAV 7 Excessive Salt.mp4 Watch the video clip three times and complete each statement in no more than 6 words according to the information from the video clip. 1. A well-known health group gives a new warning that many meals in popularchain restaurants have___________________________________________________________________________. 2. Salt is said to be the single ___________________ in our food supply. 3. Eating too much salt causes the walls of muscles to______________. 4. Some people consume massive amounts of salt and end up with______________. 5. And some people come to the emergency room with ___________________. 6. Few people have any idea how much salt _____________ in that next restaurant meal.

【填空题】工作原理：推动阀杆6，顶起钢珠4打开或关闭阀口，从而达到泄气效果。 1. 填空题： （1）本装配图由 个图形表达，主视图采用 剖视图，该图中用双点画线绘制图形是 画法。 （2）本图的总体尺寸是 ， ， 。尺寸?6H7/g6属于 尺寸，表示件 和件 之间的配合，是 制 配合。 （3）件2的材料是 ，件6的材料是 。 （4）G1/2是 螺纹，尺寸代号为 ，单位是 。 （5）件3在装配体中的作用是 。 （6）目前状态气阀是 （填：打开/关闭）的。当 向 移动，使钢珠在弹簧的作用下向 移动，堵住右端孔口，使气阀关闭。

【填空题】阅读轴零件图，回答下列问题1．该零件的名称是_____，材料是_______，比例是______。 2．该零件共用了____个图形来表达，主视图中共有_____处作了______，并采用了________画法，另两个图形的名称是___________。 3．在轴的右端有一个_____孔，其大径是______，螺孔深度是_______，旋向是________。 4．在轴的左端有一个键槽，其长度是______，深度是_____，宽度是______，定向尺寸是__ ____，键槽两侧的表面粗糙度要求是______。 5．尺寸Φ25±0.065的基本尺寸是______，最大极限尺寸是_________，最小大极限尺寸是_________，公差是______。 6．图中未注倒角的尺寸是______，未注表面粗糙度符号的表面Ra值是______μm。 7．图中框格 表示被测量要素__________________，基准要素是______和______的公共轴线，位 置公差是_________，公称值是______。 8．在图上指明三个方向的尺寸基准。（3分） 9．图中的两个断面图，没标字母，请说明原因。（3分）