下列金属的工业制法正确的是 [ ] A.制钛:用金属钠置换出氯化钛(TiCl4)

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问题:

下列金属的工业制法正确的是 [ ]

A.制钛:用金属钠置换出氯化钛(TiCl4)溶液中的钛

B.炼铁:用焦炭和空气反应产生的一氧化碳在高温下还原铁矿石中的铁

C.制钠:用海水作原料制得精盐,再电解纯净氯化钠溶液得到金属钠

D.炼铜:用黄铜矿经电解精炼得到纯度为99. 9%的铜

考点:金属的冶炼
题型:选择题

下列不属于个人健康保险常用的主要条款的是( )。

A.犹豫期条款
B.宽限期条款
C.等待期或观察期或事先存在条件条款
D.调整保险金条款

题型:选择题

CREST的特异性抗体是()。

A.抗PM-1抗体

B.抗SSA抗体

C.抗SM抗体

D.抗核仁RNA抗体

E.抗着丝点抗体

题型:选择题

泌尿系感染最常见的病原菌是

A.革兰阳性杆菌
B.革兰阴性球菌
C.革兰阳性球菌
D.革兰阴性杆菌
E.真菌

题型:选择题

事故发生后,有关单位工作人员要立即报告就近车站、调度所()。

A.电务调度员

B.列车调度员

C.值班主任

D.值班副主任

题型:选择题

Selection to participate in a top executive-education program is an important rung on the ladder to top corporate jobs. U. S. corporations (1) billions of dollars in this form of management development -- and use it to (2) and train fast-track managers. Yet one (3) of executive education found that less than 5% of the managers (4) to these high-profile programs are women -- and minorities are terribly (5) as well.

The numbers are (6) . In regular business (7) usually paid for by the participant, not an employer -- there are plenty of women and minorities. Women, for example, (8) for about 30% of MBA candidates. Yet in the (9) programs paid for by corporations that round out a manager’s credentials at a (10) career point, usually at age 40 or 45, companies are making only a (11) investment in developing female and minority executives. A case (12) point: Only about 30% of the 180 executives in Stanford’s recent (13) management program were women.

Most companies say these days they are (14) hiring and promoting women and minorities-- and there are some (15) trends in overall employment and pay levels so why are companies (16) the ball when it (17) executive education The schools (18) that they are neither the cause of nor the cure for the problem. A Harvard Business School dean figures that companies are (19) of sending their female executives (20) they don’t want to lose them to competitors.

4()

A.delivered

B.transported

C.transmitted

D.sent

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