钩体病的基本病变是（） A.全身小血管广泛性损伤 B.小血管炎及血管周围炎性细胞浸润

Public reports by national commissions, governors’ conferences, and leadership groups have stressed the great need for better understanding of international affairs by the citizenry. If the country is to remain a leading nation in an era of international competitiveness, the need is undeniable. If there is such a need for the citizenry to have a better understanding of international affairs, then all of our new teachers must be prepared to teach their subject matter with an international orientation.
If all of the statements in the passage are true, which one of the following must also be true

A．If the country is to remain a leading nation in an era of international competitiveness, then new teachers must be prepared to teach their subject matter with an international orientation.

B．If new teachers are prepared to teach their subject matter with an international orientation, then the country will remain a leading nation in an era of international competitiveness.

C．If there is better understanding of international affairs by the citizenry, then the country will remain a leading nation in an era of international competitiveness.

D．If the country is to remain a leading nation in an era of international competitiveness, then there is no need for the citizenry to have a better understanding of international affairs.

E．(E) Public reports from various groups and commissions have stressed the need for a more international orientation in the education of teachers.

有一种含碘和氧两种元素的化合物，可称为碘酸碘，其中该化合物中的碘元素呈现两种不同价态+3价和+5价，根据你的现有化学知识水平和综合能力，请给出该化合物的化学式______________________．

交换式局域网增加带宽的方法是在交换机多个端口之间建立______。

A．点-点连接

B．并发连接

C．物理连接

D．数据连接

患者，男，60岁，肺癌术后5年，腰背痛2个月。CT示L₃椎体下缘、L₄椎体上缘 破坏，L_3～4椎间盘破坏，L_3～5双侧椎旁软组织肿胀，最大可能是

A．转移瘤

B．血管瘤

C．结核

D．骨髓瘤

E．椎间盘突出

（） is to get the materials and services from a company.

A.Ordering    

B.Procurement    

C.Purchasing     

D.Application