在低压系统中，人体的一部分直接或通过某种导体间接触及电源的一相，而人体的另一部分直接

供应链管理的关键技术问题是（）。

A．如何进行企业间的利润分配

B．如何进行企业间的流程控制

C．如何实现企业间的信息共享

D．如何实现企业间的协同工作

E．如何实现不同企业文化的融合

53．2008年11月26日晚至27日凌晨，印度孟买发生连环恐怖袭击事件。造成至少160人死亡，300人受伤。据悉，此次袭击事件主要针对英美人士。安理会和潘基文秘书长分别发表声明，对此予以强烈谴责。这一事件说明

①恐怖主义是人类的公害

②恐怖主义是威胁世界和平与稳定的主要根源

③当前，世界的和平局面很不稳定

④维护国际和平与安全是联合国的宗旨之一

A．①②③

B．①②④

C．①③④

D．②③④

继电联锁是靠（）的接点线圈组成一套复杂的开关量控制电路，实现对信号设备联锁控制。

A.继电器

B.电动转辙机

C.信号机

D.维修机

试验后试桩处置，累计位移量不超过15mm，可（）。

A、灌注水泥浆

B、灌注水泥砂浆

C、灌注混凝土

D、灌注清水

This book is written expressly for students in an attempt to present the material that is most useful and interesting to them. Previous courses in chemistry are not necessary for the understanding of the material, although those students who have had high school chemistry will find that a review of the inorganic section will better enable them to master the organic and biochemistry sections that follow.

The author has felt that in the past there was an improper selection of material from inorganic, organic, and biochemistry in the majority of the textbooks of chemistry for nurse. The tendency has been to develop the inorganic chemistry to such an extent that organic and biochemistry is covered too briefly. The recent advances in biochemistry and their widespread application to the practice of medicine and nursing have considerably altered the situation. Not only is biochemistry more closely allied to the practical chemistry of medicine and nursing but also it is of more interest to the student. In the author’s experience the response to biochemistry has always been more favorable than to the other sections. Within the brief period allotted to chemistry, therefore, the sections on inorganic, organic, and biochemistry should be so arranged that a good share of the time is spent in the study of biochemistry. This book presents mainly those fundamentals of inorganic and organic chemistry that are necessary for the understanding of the section on biochemistry.

The fundamental points suggested in the Curriculum Guide are included in the book, with some additions in the biochemistry section. The author feels that a study of urine, vitamins, nutrition, and hormones is so obviously a part of biochemistry that at least the fundamentals should be included in this course.

The book has been planned in such a way that it may be adapted to various courses in chemistry. The material suggested by the Curriculum Guide is covered in the first nineteen chapters and may be used in accelerated courses or where minimum time is allotted to chemistry. When the time allotted to the course is sixty to ninety hours, the entire contents of the book may be used to advantage. While the book has been written especially to fit the needs of Schools of Nursing, it could readily be applied in instances where students are required to take but one course in chemistry.

The apathetic attitude of nonprofessional students toward a course in inorganic chemistry may well be overcome by the proper presentation of material selected from inorganic, organic, and biochemistry.

Which of the following is TRUE about reading the book（）

A. One must first review his high school courses

B. Previous courses in chemistry are necessary

C. A good mastery of biochemistry is essential

D. One needn’t have studied chemistry before