普通CT图像与X线图像相比，下列说法正确的是（） A.空间分辨率减低，密度分辨率增高

My sister can’t cook, I can’t, ________ .

A．too

B．also

C．either

D．neither

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 (1) to improve their efficiency and reduce (2) . 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 (3) care. WLAN management solutions provide a variety of other benefits can be substantial but difficult to measure. For example, they can protect corporate data by preventing (4) 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 management by integrating with customers’ existing systems, such as Open View 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 (5) and administrative chores.

2（）

A．personnel

B．expenses

C．overhead

D．hardware

如图所示，固定曲面AC是一段半径为4.0m的光滑圆孤形成的，圆弧与水平方向相切于A点，AB=10cm．现将一小物体先后从孤面顶端C和圆孤中点D处由静止释放，到达孤面底端时的速度分别为v₁和v₂，所需时间为t₁和t₂，则下列关系正确的是（　　）

A．v₁＞v₂，t₁=t₂

B．v₁＞v₂，t₁＞t₂

C．v₁＜v₂，t₁=t₂

D．v₁＜v₂，t₁＞t₂

对传播的定义描述正确的是（）

A.传播是一种个人化传递信息的行为

B.是个人之间交换传递、新闻、事实、意见的信息过程

C.是集体之间交换传递、新闻、事实、意见的信息过程

D.是个人与集体之间交换传递、新闻、事实、意见的信息过程

E.是个人之间、集体之间以及个人与集体之间交换、传递新闻、事实、意见的信息过程

失业人员凭（）享受公共就业服务、就业扶持政策或按规定申领失业保险金

A、失业登记证明

B、身份证

C、户口簿

D、再就业优惠证明