在天下的千万条道路中,“丝绸之路”以影响深远广泛、名字优美动听而闻名于世。作为重

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问题:

       在天下的千万条道路中,“丝绸之路”以影响深远广泛、名字优美动听而闻名于世。作为重要的商业通道,“丝绸之路”是联系中外的纽带,沟通东方和西方的桥梁。你知道汉代“丝绸之路”的路线吗?请写出来。

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

考点:丝绸之路
题型:问答题

写出一个关于x,y的二元一次方程,使它的自然数解有且只有三个,这个方程可以是______.

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男性,51岁,持续性上腹部隐痛5个月,多次查大便,潜血阳性,明显消瘦,面色苍白,上腹明显压痛,未触及包块,予制酸、止血等治疗2周,大便潜血仍阳性。

为确诊应选何种检查()。

A.X线钡餐检查

B.腹部B超

C.腹部CT

D.腹部平片

E.胃镜+活检

题型:问答题

常用的抽样方法中,整群抽样的优点是( )。

A.样本代表性好

B.便于组织、节省经费
C.误差小于单纯随机抽样
D.均数、率及相应的标准误计算简单

题型:问答题

WLANs are increasingly popular because they enable cost-effective connections among people, applications and data that were not possible, or not cost-effective, in the past. For example, WLAN-based applications can enable fine-grained management of supply and distribution (51) to improve their efficienty and reduce (52) . WLANs can also enable entirely new business processes. To cite but one example, hospitals are using WLAN-enabled point-of-care applications to reduce errors and improve overall (53) care. WLAN management solutions provide a variety of other benefits that can be substantial but difficult to measure. For example, they can protect corporate data by preventing (54) through rogue access points. They help control salary costs, by allowing IT staffs to manage larger networks without adding staff. And they can improve overall network mananement by integrating with customers’ existing systems, such as OpenView and UniCenter. Fortunately, it isn’t necessary to measure these benefits to justify investing in WLAN management solutions, which can quickly pay for themselves simply by minimizing time-consuming (55) and administrative chores.

A. exploitation B. connection C. departmentD. deployment

题型:问答题

水淬渣生产水泥的缺点,如何克服?

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