Mobile phone empty Island brush
1. Back up important data and photos and restore factory settings. Don't install applications from unknown sources. In addition, don't authorize in permission settings
2. You can swipe the computer to see if it can't work. Besides, the computer needs to clean up the memory on time so that it won't get stuck. The memory of the mobile phone is seriously insufficient. It is recommended to clean up the memory lightly, and then restart your mobile phone again
3. Clear the data of the mobile phone. If there are important things, save them on the network disk first, and then restore the factory settings three times. This is safer
1. Set the security level of the browser. Our common browsers all have the function of security level setting. Through reasonable setting, we can effectively filter the access restrictions of some illegal websites, so as to rece the damage to computers and personal information
2. Firmly resist reactionary, pornographic and violent websites. On the one hand, these bad information will affect the physical and mental health of teenagers, on the other hand, many illegal websites will use browser vulnerabilities to attack users3. Don't click illegal links at will
When downloading software and materials, we should choose the regular website or official website5. Turn off some sensitive functions in common communication software. Such as "people nearby" in wechat and "allowing strangers to view photos" in wechat privacy
6. Do not take photos of your family and address. If it goes on like this for a long time, as long as it is analyzed and summarized by others, the information exposed will become a complete set of information, which hides all kinds of unpredictable risks
Do not test related information on the Internet. Some websites do surveys and ask for information about age, hobbies, gender, etc. to do it for a small profit. This information may be used by others, and graally summarized, and sold to others for profit or threat1. First of all, use stones or other blocks to place them as shown in the figure
2. Is there a villager? If so, it is recommended to plant a large number of sugarcane
brush the ore quickly
3. Is there a mole? If so, I don't have to say anything more
by formula σ＝ F/L δ 1≤[ σˊ t] F = L δ 1[ σˊ t]
it is known that l = 100 mm = 10 cm δ 1 =8mm=0.8cm σˊ T = 167mpa = 1670kgf / cm2
then: F = 10 × zero point eight × 1670 = 13360kgf
A: the maximum tensile force of the weld is 13360kg.
welding stress refers to the stress caused by welding. The internal stress proced in the welding process and the shape and size changes of the weldment caused by the welding heat process. The non-uniform temperature field in the welding process and the local plastic deformation and microstructure with different specific volume caused by it are the fundamental causes of welding stress and deformation. When the non-uniform temperature field caused by welding has not disappeared, this kind of stress and deformation in the weldment is called transient welding stress and deformation; The stress and deformation after the disappearance of welding temperature field are called resial welding stress and deformation. Under the condition of no external force, the welding stress is balanced inside the weldment. Welding stress and deformation will affect the function and appearance of weldment under certain conditions, so it must be considered in design and manufacture.