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较细的金属比晶粒较粗的同种金属有 (7) 的强度和硬度及 (8) 塑性和韧性，这种现象称为 (9) 强化；铸造工艺中细化晶粒的常用方法是 (10) 和 (11) 。 11（）
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某虚拟存储系统采用最近最少使用（LRU）页面淘汰算法，假定系统为每个作业分配4个页面的主存空间，其中一个页面用来存放程序。现有某作业的程序如下： Var A: Array[ 1...100,1...100] OF integer; i,j:integer; FOR i:=1 to 100 DO FOR j:=1 to 100 DO A[i,j]:=0; 设每个页面可存放 200个整数变量，变量i、j存放在程序页中。初始时，程序及i, j均己在内存，其余3页为空。若矩阵A按行序存放，那么当程序执行完后共产生()次缺页中断；若矩阵A按列序存放，那么当程序执行完后共产生()次缺页中断。 若矩阵A按列序存放，那么当程序执行完后共产生（）次缺页中断。
当年形成的会计档案，在会计年度终了后，可暂由会计机构保管1年，期满之后，应当由会计机构编制移交清册，移交本单位档案机构统一保管；未设立档案机构的，应当在会计机构内部指定专人保管。（ ）
Text 3Like dog’s poop on city pavements, rubbish left behind by tourists at natural sites is disgusting.The funny thing is nobody likes seeing such mess in the places they are visiting but it seems only few really care enough to keep the place tidy. The obvious result is that garbage has become a common sight in forests which attract tourists.We are certain that in many places park rangers—despite their small numbers, incomparable to the tremendous tourist troops—are already doing the best they can. Sometimes, however, we believe things could still be better.Take the Thi-Lor-Su waterfall in Tak province for instance. One of the things about Thi-Lor-Su which we would like to talk about today is the commendable method of rubbish control at the waterfall.There, food and drinks in commercial packaging are prohibited. The ban is enforced by requiring that each and every visitor heading from the camping ground to the waterfall has to pass through a checkpoint where their bags are inspected and potential garbage is seized. The results have been amazing. Despite thousands of visitors, the 1. 5-kilometre trail to Thi-Lor-Su, as well as the waterfall itself, is almost free of garbage.However, within the same forest, along the 16 kilometers of rough road from the Pha Luead checkpoint to the camping ground, the situation is completely different. Both sides of the road are littered with rubbish, from candy wrappers to Styrofoam food boxes to plastic water bottles.One contributing factor to the mess is that several tour operators use ordinary pick-up trucks to transport their clients in and out of the forest. The ordinary trucks often get stuck and tourists are forced to walk the rest of the distance—which can be several kilometers. And, as you would expect, there are more inconsiderate tourists than conscientious ones. Along the way, people eat and throw rubbish.One solution to this problem is to encourage tour operators to use proper vehicles. Either that or put off traveling into the forest until the road is really dry and passable. We can learn that, while visiting the Thi-Lor-Su waterfall, visitors（）
正确识别风险点、非风险点、敏感点和权衡点是进行软件架构评价的关键步骤。其中 （） 是实现一个特定质量属性的关键特征，该特征为一个或多个软件构件所共有。“改变加密的级别可能会对安全性和性能都产生显著的影响”，这是一个对系统 （） 的描述。 其中 （） 是实现一个特定质量属性的关键特征，该特征为一个或多个软件构件所共有
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