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【多选题】
《中国21世纪初可持续发展行动纲要》的指导思想是：坚持（ ），以科学和体制创新为突破口，坚持不懈地全面推进经济社会与人口、资源和生态环境的协调，不断提高我国的综合国力和竞争力，为实现第三步战略目标奠定坚实的基础。A.
以人为本
B.
以可持续发展为主线
C.
以经济发展为核心
D.
以提高人民群众生活质量为根本出发点
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举一反三
【简答题】根据轴的承载情况,工作时既承受弯矩又要承受转矩的轴称为( );只传递转矩的轴称为( );只承受弯矩的轴称为( )。
【简答题】根据轴的承载情况，工作时既承受弯矩又承受转矩的轴称为（）；主要承受转矩的轴称为传动轴；只承受弯矩的轴称为心轴。
【单选题】—May I speak to your manager Mr. Williams at five o’clock tonight? —I’m sorry. He ________ gone to a party long before then.
A.
had
B.
is
C.
will have
D.
has
【简答题】只承受弯矩的轴称为（）。只承受转矩而不承受弯矩的轴称为（）。
【简答题】—“May I speak to your manager Mr. Williams at five o’clock tonight?” —“I’m sorry. Mr. Williams ________ to a conference long before then.” A) will have gone B) had gone C) would have gone D) has gone
【单选题】---May I speak to your manager Mr.Willians at five o'clock tonight?' ---'I'm sorry, Mr.Williams _______ to a conference before then.'
A.
will have gone
B.
had gone
C.
would have gone
D.
has gone
【单选题】— “May I speak to your manager Mr. Williams at five o’clock tonight?” — “I’m sorry. Mr Williams ________ to a conference by then.”
A.
will have gone
B.
had gone
C.
would have gone
D.
has gone
【单选题】—May I speak to your manager at three o’clock tomorrow afternoon ?—I’m sorry, He to Shanghai by t
A.
29．—May I speak to your manager at three o’clock tomorrow afternoon ? —I’m sorry, He to Shanghai by then A．had flown
B.
could have flown
C.
will have flown
D.
has flown
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