缝纫机压脚压力要根据缝料的（）加以调节。A.厚度 B.弹性 C.丝绺 D.图案

以下关于肝脏病变的MRI信号强度等级的解释哪些正确（）

A.稍高信号-信号介于脂肪与肝之间

B.极高信号-信号与脂肪相同

C.稍低信号-信号介于肝与血管之间

D.极低信号-信号与肝内血管信号相同

E.等信号-信号强度与肝脏信号相同

下表为周期表的一部分，其中的编号代表对应位置的元素。

①

②

③

④

⑤

⑥

⑦

⑧

⑨

⑩

请回答下列问题：

（1）写出上表中元素⑨原子的核外电子排布式                 。

（2）元素④、⑤的第一电离能大小顺序是：    ＞     ；（用元素符号表示，下同）元素⑥、⑧电负性大小顺序是：     ＞     

（3）元素③、⑧形成的化合物中心原子杂化轨道类型：       ，分子的空间构型           

（4）已知某些不同族元素的性质也有一定的相似性，如元素②与元素⑦的氢

氧化物有相似的性质。写出元素②的氢氧化物与NaOH溶液反应的化学方程式                          

（5）下图是⑩的某种氧化物的晶胞结构示意图（顶角和体心是氧），可确定该氧化物的化学式为           。

（6）往硫酸铜溶液中加入过量氨水，可生成[Cu(NH₃)₄]^2＋配离子。

已知NF₃与NH₃的结构类似，但NF₃不易与Cu^2＋形成配离子，其主要原因是：                                                         

To compete in today’s fast-paced competitive environment, organizations are increasingly allowing contractors, partners, visitors and guests to access their internal enterprise networks. These users may connect to the network through wired ports in conference rooms or offices, or via wireless access points. In allowing this open access for third parties, LANs become ___19___. Third parties can introduce risk in a variety of ways from connecting with an infected laptop to unauthorized access of network resources to ___20___ activity. For many organizations, however, the operational complexity and costs to ensure safe third party network access have been prohibitive. Fifty-two percent of surveyed CISOs state that they currently use a moat and castle’s security approach, and admit that defenses inside the perimeter are weak. Threats from internal users are also increasingly a cause for security concerns. Employees with malicious intent can launch ___21___ of service attacks or steal ___22___ information by snooping the network. As they access the corporate network, mobile and remote users inadvertently can infect the network with ___23___ and worms acquired from unprotected public networks. Hackers masquerading as internal users can take advantage of weak internal security to gain access to confidential information.

21（）

A．renounce

B．virtUOUS

C．denlal

D．traverse

今天的科学与技术的关系是什么（）

A、相互分离

B、高度一体化

C、相互对立

D、没有关系

如果发现出资者以尚在诉讼中的有产权纠纷的房屋出资，则拄册会计师一般不能认定其产权归属，不能对房屋的出资进行审验确认。 ( )