人教新课标高中英语必修四Unit 4 Body language课件(2)

3.1 Introduction Vitamins are classically defined as a group of organic compounds required in very small amounts for the normal development and functioning of the body. They are not synthesised by the body, or only in insufficient amounts, and are mainly obtained through food (Machlin and Huni, 1994). There are thirteen vitamins: four are fat-soluble, namely vitamins A (retinol)

49.1 The bodies of vertebrates are organized into functional systems. Organization of the Body. Cells are organized into tissues, and tissues are organized into organs. Several organs can cooperate to form organ systems

Dynamics Introduction 1. The subject of dynamics is the relation between the mechanical motion of a material body and the force acting on it. 2. Two models of mechanics. )A particle is a material body possessing mass, the shape and size of which can be neglected in investigating its motion

---skin is the largest organ of the body, it constitutes about 16% of body weight ---its total surface area is about 1.2-2.2 m2 ---function: protection, sensory reception, excretion and thermoregulation

The Methodology of Positive Economics* In his admirable book on The Scope and Method of Political Economy, John Neville Keynes distinguishes among \a positive science . . . a body of systematized knowledge concerning what is; a normative or regulative science ... a body of systematized knowledge

Fever .Normal body temperature 37°C, Circadian variation oral T00.5> axillary(腋温)

In this lecture, we consider the problem of a body in which the mass of the body changes during the motion, that is, m is a function of t, i.e. m(t). Although there are many cases for which this particular model is applicable, one of obvious importance to us are rockets. We shall see that a significant fraction of the mass of a rocket is the fuel, which is expelled during flight at a high velocity and thus, provides the propulsive force for the rocket

The brain is a complex and delicate part of the human organism. It works in special ways through the three systems the Sensory system which functions as receiving information from the outside world; the Motor system which is of the function of sending instructions to the body the Homeostatic system which functions as telling parts of the body how to work or more. But the computer can't do these ways nowadays because it lacks imagination

In this lecture, we will derive expressions for the angular momentum and kinetic energy of a 3D rigid body. We shall see that this introduces the concept of the Inertia Tensor. Angular Momentum We start form the expression of the angular momentum of a system of particles about the center of mass