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10BASE2以太网通过______接口将电缆直接连接到网卡中的内部收发器上。

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患者，女，40岁。不明原因的手足发麻，关节肿痛半年余。开始为手指小关节疼痛，后出现其他关节疼痛，呈对称性，遇寒或晨起时关节发硬，活动后减轻，舌苔薄白，脉浮紧。其最有意义的检查是

A. 血沉
B. 抗核抗体
C. 双手X线平片
D. 抗链球菌溶血素“O”
E. 肾功能

Colleges in the US have added a new subject, “great chemistry”, to their curriculum today. “Green chemistry 51 how we can develop products that won’t 52 the environment,” explains Paul Anastas, director of Yale University’s Center for Green Chemistry and Green Engineering, opened at the beginning of this year. The American Chemical Society, 53 approves more than 600 college chemistry programs, only lists about a dozen that teach green chemistry. But that 54 is growing.Cambridge College in Massachusetts is offering “ an introduction to green chemistry” course this gall and is offering the nation’s first bachelor’s and master’s 55 in green chemistry. The program will have classes in environmental science and even environmental 56 and policy. These subjects are not 57 taught to chemistry major.Employers 58 the introduction of green chemistry. Businesses are increasing seeking graduates 59 backgrounds in the subject because it can help them make or save money in he development and manufacturing of products. “We need people who can not only understand their place 60, but also understand the worldwide perspective,” said Adam Peterson, a chemical division manager at Dow Corning Corp.

A. controversially
B. eventually
C. gradually
D. traditionally

债权人转让债权应当经债务人同意。（）

A. 对
B. 错

采购员张同预借差旅费900元，以现金支付。