This book is intended to provide the students of physical
science with help in mastering elementary physics, chemistry, earth science and
astronomy (天文学). A wide spectrum (范围) of topics is covered, so that the reader
may select those which correspond to his particular interest or needs.
Each chapter begins with an outline of its subject. The discussed problems
that follow are of two kinds: those that are connected with past development of
physics and chemistry, and those that concern important facts and ideas in
physical science. The supplementary problems at the end give the
reader both a chance for practice and a means to judge his progress.
The book will help those who major in (46) to master
the elementary knowledge of physics, chemistry, (47) and
astronomy. At the beginning of each chapter, there is
(48) of its subject. In each chapter, (49) of
problems are discussed. (50) at the end make
the reader practice and judge his progress.