Unit 4 Astronomy: the science of the stars Using Language 1 Pre-listening Isaac Newton (1642～1727 英国物理学家) 2 经典物理学理论体系的建立者。 1665年创立微分;1666年开始研究积分。 1666年,开始想到研究重力(gravity)问题,苹果落地 的传说,也是在此时发生
33. What is the second paragraph mainly about? A. The classification of the popular. B. The characteristics of adolescents. C. The importance of interpersonal skills. D. The causes of dishonorable behavior. 34. What did Dr. P...
When the structure (the skull, spine, pelvis, and bones) are not aligned, the muscles have to support us against the force of gravity. With so many things misaligned, comes a war of muscles and contractures that fatigue and tire causing discomfort in any position (standing, sleeping, sittin...
典例5Two of the authors of the review also made a study published in 2014 ___ showed a mere five to 10 minutes a day of running reduced the risk of heart disease and early deaths from all causes.分析:分析句子结构可知,空处引导限制性定语从句,修饰先行词a study,并在定语从句中作主语,故填...
Saturn is ever losing its rings, but very very slowly. They are not disappearing at a rate we would be able to see clearly with a telescope from Earth, but as the rocks and ice of the rings move around Saturn, they are [slowly] losing pieces into Saturn as gravity pulls them in. ...
The best scientific description of gravity is Einstein’s theory of General Relativity (GR). However, assuming its validity at all astronomical scales leads to gravitational anomalies. For example, rotation velocities of disk galaxies are inconsistent with the predictions of GR; the theory predicts or...
Gravity is holding you onto the side of a rock that is rotating around its axis at a speed of around 1,038 miles per hour (when measured at the equator). This rock is Earth, your home, and at this speed the Earth makes one full rotation once about every 24 hours. The Earth is or...
then enteringLockdown room, the Relocations which prevented some amount of backtracking now allow togo back to nearly the Taser pickup area, to grabCuriosities / Recordingson the roofs or play theBonus Room with the Taser. This is nowallowed. To check fornew bugs with this now-legal backtrac...
Unbalance happens when the centre of gravity of a rotating component is off relative to the centre of rotation. This can e.g. happen when having eccentric mass. Common types of unbalance are: force unbalance, couple unbalanced, and dynamic unbalance. Force unbalance can be corrected by balan...
What health problems do astronauts have? Life in zero gravity causes changes to our bodies. Bones and muscles(肌肉) become thin and weak so you must do a lot of exercise in space to stay fit and to help the heart move blood around your body. Astronauts often get backache because you gr...