2018精品高考英语一轮复习(课件)必修3_Unit_4_Astronomy：the_science_of_the_starsppt课件

出席；到场；存在 有害的 链子；连锁；锁链 反应；回应 乘；增加 氧 存在；生存 因此；于是
16． puzzle n． vt.& vi.
17． biology n. 18． biologist n. 19． gravity n. 20．satellite n. 21． gentle adj.
谜；难题 (使)迷惑；(使)为难 生物学 生物学家 万有引力；重力 卫星；人造卫星 温和的；文雅的
酸 哺乳动物 二氧化物 灭绝的；绝种的 减少；减轻 失重地
表达单词
1． system n． 2． unlike prep. 3． fundamental adj. 4． multiply vi.&vt. 5． gentle adj. 6． crash vi.&vt. 7． pull n．&vt. 8． float vi.&vt.
28． globe n． 29． exhaust vt. 30． in time 31． lay eggs 32． give birth to 33．in one's turn 34． prevent ... from
球体；地球仪；地球 用尽；耗尽；使精疲力尽 及时；终于 下蛋 产生；分娩 轮到某人 阻止；制止
天文学 天文学家 太阳的；日光的 〈英〉万亿；〈美〉十亿 碳 溶解；解散 酸
8．mammal n． 9．dioxide n. 10．extinct adj. 11．lessen vi.& vt. 12．weightlessly adv. 13．solar system 14．carbon dioxide
(一)核心单词
阅读单词
1．astronomy n． 2．astronomer n. 3．solar adj. 4．billion pron.&n.& adj. 5．carbon n． 6．dissolve vt.& vi.

•Unit 4 Astronomy: •the science of the stars
• 话题·科学技术
• 假设你将参加某英语杂志社开展的一次征文 活动，征文的内容要求你在电视、手机(cell) 和网络三者中，放弃其中一个并陈述理由。 请你以“Which would you give up: TV, cell, or Web？”为题u give up: TV, cell, or Web? We are now living in an information age, in
which TV, cells and the Web are widely used.It seems that many people cannot enjoy themselves without them.However, if I had to give up one of them, I would turn off the TV rather than switch off my cell or cut off the Internet.
• 大家都认为计算机技术可以帮助人们获得更 多工作或提升机会。
• 3．We will spare no efforts to catch up with the advanced world levels.
• 我们将努力赶上世界先进水平。
• Ⅰ.单词速忆 • 1．_____p_u_ll___vt.&n．拉(力)；拖；牵引力 • 2．_____fl_o_a_t __vi.&vt.(使)浮动；(使)漂浮
防
• 6．____g_i_v_e_b_ir_t_h_to___产生；分娩 • 7．______bl_o_c_k_o_u_t ___挡住(光线) • 8．____s_o_l_ar_s_y_s_te_m___太阳系 • 9．______i_n_t_im__e____及时；终于 • 10．___i_n_o_n_e_'s_t_u_rn____轮到某人；接着 • 11．_____n_o_w_t_h_a_t ____既然

He pulled the door open and rushed out. 他拉开门，冲了出去。
Several houses were pulled down to make way for the new road. 为了给新修的道路让路，几座房屋被拆毁了。
The police car signaled to us to pull in. 警车发出信号，要我们驶向路边停靠。
学生用书见P70
1 atmosphere n.大气层，空气；环境，气氛
They were in time to produce carbon,nitrogen,water vapour and other gases, which were to make the earth’s atmosphere.（教材P26）
最终产生了碳、氮气、水蒸气和其他气体，从而形成了地 球的大气层。
on time
准时；按时
in no time 立即；马上
4 pull n．& vt.拉(力)；拖；牵引力
As the rocket rose into the air， we were pushed back into our seats because we were trying to escape the pull of the earth’s gravity. （教材P30）
很多科学家相信，由于地球上长期有水存在，它使得地球得 以把有害气体和酸性物质溶解在海洋里。
(1) be harmful to...
对……有害
harm n.& vt.
伤害；损害
(2) do harm to.../do...harm 损害…… There is no harm in doing sth. /It does no harm to do sth.

18．__c_li_m_a_t_e____ n．气候→__w_e_a_t_h_e_r___ n．天气
重 点
19．__p_u__ll___ n．& vt.拉(力)；拖；牵引力→__p_u_s_h___ n．& vt.推；推动，推进
单 20．___e_x_i_s_t__ vi.存在；生存→__e_x_i_st_e_n_c_e____ n．存在；生存
词
烈；猛烈→__v_i_o_le_n_t_l_y____ adv.暴力地；猛烈地 14．_h__a_rm__f_u_l___ adj.有害的→__h_a_r_m___ n．& vt.损害；伤害；危害
→__h_a_r_m__le_s_s___ adj.无害的
15．___p_u_z_z_le___ n．谜；难题 vt.& vi.(使)迷惑；(使)为难→___p__u_zz_l_e_d__ adj.感
法 What it was to become was uncertain until between4．5 and3．8 billion years ago 要 when the dust settled into a solid globe.(教材 P25) 点 Why they suddenly disappeared still remains a mystery.(教材 P26)
1．_m__a_tc_h_…___w_i_th___ 使……和……相匹配
2．_i_n_t_im__e_____ 及时；终于
3．_g_i_v_e_b_i_r_th__to___ 产生；分娩
4．_i_n_o_n_e_'_s_t_u_r_n__ 轮到某人；接着
5．_p_r_e_v_e_n_t_…__f_r_o_m__ 阻止；制止