1．渗透作用是有大液泡的植物细胞吸收水分的主要方式，下列能够称之为渗透作用的是 ( ) A．钾通过原生质层 B．氧气通过细胞膜 C．水通过原生质层 D．水分子通过细胞壁
A.根据所听句子,选择正确的答语 读一遍 5分 ( )1.A.Thank you ,I’m well . B. Thank you .You are lucky . C. It’s very kind of you ,thank . ( )2.A.Congratulations. B. You must be very happy. C.I don’t believe you . ( )3.A.Never. B. Twice a year . C. Three
一、选择题 1、我国历史上最早建立军队，制定刑法，设置监狱是在（ ） A、夏朝 B、商朝 C、东周 D、春秋
Unit 11 Scientific achievements 一、单项选择 1. The sky is clear, so it’s not _____ to rain this afternoon. A. doubtful B. likely C. certain D. rarely
unit12 1.The belief that ___ people find it more convenient to shop pn Sundays ___ in the research. A. that ; was proved B.that; were proved C.which; proved D.whether; proved
Unit 12 Fact and fantasy 一、单项选择 1. This man’s appearance _____ her of her father. A. remembers B. recalls C. suggests D. reminds
Unit 13 The water planet 一、单项选择 1. It was reported that _____ of the people at the meeting. A. three-fifths; were B. third-fifths; was C. three-fives; are D. three-fifth; were
Unit 14 Freedom fighters 一、单项选择 1. She was _______ for helping the murderer to escape. A. searched B. brought C. arrested D. caught
Unit 15 Destinations 一、单项选择 1. Mr. Jones said he was looking _____ the possibility of buying a house. A. into B. after C. down upon D. out for
1．渗透作用是有大液泡的植物细胞吸收水分的主要方式，下列能够称之为渗透作用的是 ( ) A．钾通过原生质层 B．氧气通过细胞膜 C．水通过原生质层 D．水分子通过细胞壁
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