【单选题】The message the author wishes to convey in the passage is that_.
A.
human civilization remains glorious though it is affected by climatic changes
B.
mankind is virtually helpless in the face of the dramatic changes of climate
C.
man has to limit his activities to slow down the global warming process
D.
human civilization will continue to develop in spite of the changes of nature
【单选题】My mother ________ as an architect since she graduated from Tongji University.
【简答题】用所给词的适当形式填空。 1. He worked hard and has ________ (great) improved his English. 2. My mother always ________ (courage) me to study hard. 3. We all think Nie Haisheng and FeiYunlong are both ________ (he...
【单选题】回转体动平面如图a所示,沿Y轴回转得到的轴测图是:【图片】
【单选题】在短期中,随着产量的增加,平均固定成本( )。