题目内容

Section B Conversation 2 第9题

A)To sign a contract.
B)To take a holiday.
C)To visit his partner.
D)To have a family gathering.

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Section B Conversation 2 第10题

A)9 am.
B)10 am.
C)2 pm.
D)3 pm.

Section C“___11”,the slogan of the Beijing 2008 Olympic Games, is an embodiment of the 12_of hundreds and thousands of people.”It expresses the 13_of a great nation with a long history of 5000 years and on its way towards modernization, which is committed to _14__development, a harmonious society and people’s _15____,”said Liu Qi, President of the Beijing Olympicing Committee for the Games of the XXIX Olympic.

Section D16.What do many young people think of the Internet?It is a good place to__________________17.What can young people practice on the Internet?They can practice by talking with people.18.What is important for youngpeople to know when talking with strangers online?Talking with strangers online can be_.19.What should you do to protect yourself online?Never give yourto anyone.20..What should you do if you feel uncomfortable with the topics of conversation?Stop___________.

诱变处理后植株成活率约50％的剂量为（）。

A. 半致死剂量
B. 半致矮剂量
C. 临界剂量
D. 极限剂量