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The above design, as commented above, when executing the Resize method of SmartTest, if a rectangular object is passed in, when the height is greater than the width, the width will be automatically increased until it exceeds the height. However, if a square object is passed in, it will fall into a dead loop. The fundamental reason at this time is that rectangles cannot be the parent class of squares. Since there is a problem, they can be reconstructed so that both of them inherit from quadrilateral classes. The refactoring code looks like this:《如果没有》互联网特点鲜明，每集约十分钟，由固定的演员演绎不同人物之间发生的独立小故事，故事以搞笑为主，穿插着温情、催泪的元素。所有的故事都是在“如果没有”某种事物的前提下发生，如：如果没有手机，将会发生一个什么样的故事？如果没有爱情，将会发生一个什么样的故事？该剧意在使观众在发笑的的同时，引发他们对生活的思考。　　鸫虽有一丝犹豫，但最终决定参与“鸱鸺”，展开对“稀有之物”的调查活动。At that tail of the warhead, the drag armour-piercing firebomb is filled with a drag agent and a fireagent, Under the pressure of propellant propelling warhead, it will spontaneously ignite to produce open flame, So it can break through the oil drum and ignite or detonate the gasoline. However, the old-fashioned traced armour-piercing firebombs have obvious trajectories due to traced light when they are launched. Therefore, it is very easy to expose oneself while pointing targets to friendly forces. Therefore, the new tracer armour-piercing firebombs now equipped all start to burn and emit light only after the projectile flies out of the muzzle for a certain distance (the generally set safe distance is 100 meters, which makes it impossible for the enemy to judge the firing position with tracer ammunition, while targets within 100 meters do not need to be indicated by tracer), The principle is generally to ignite the tracer and combustion agent carried by the projectile by accumulating the heat generated by the warhead's friction with the air after flying for a certain distance to a certain extent.因此，他们就沉默了。陈启的声音突然大了起来：但是你现在干了什么？出演一部大制作电视剧的主角。