已知轧前轧件高165mm,轧后轧件高119mm,请计算压下量?
参考答案:
压下量;Δh=H-h=165mm-119mm=46mm。
短文填空。阅读短文,并用括号内所给动词的适当形式填空,必要时可加助动词和情态动词等。
Be sure to see this exhibition at the Lido Gallery. Amy Kim is 1______ (consider) to be one of the
best-known Chinese photographers in the world today, and some of her most famous photos 2______
(be) in this exhibition. She really 3______ (have) something for everyone. There 4______ (be) many
great photos of the countryside. The few city photographs don't 5______ (succeed). I 6______ (see)
the same things every day and they don't 7______ (interest) me as much. But this show 8______ (come)
from a world-class photographer. Whatever you 9______ (do), 10______ (not miss) this exhibition.
2007年粮食种植面积10553万公顷,比上年增加70万公顷;棉花种植面积559万公顷,增加7万公顷;油料种植面积1094万公顷,减少60万公顷;糖料种植面积167万公顷,增加10万公顷。 全年粮食产量50150万吨,比上年增加350万吨,增产0.7%,其中,夏粮产量11534万吨,增产1.3%;早稻产量3196万吨,增产0.3%;秋粮产量35420万吨,增产0.6%。 全年棉花产量760万吨,比上年增产1.3%。油料产量2461万吨,减产42%。糖料产量11110万吨,增产11.4%。烤烟产量239万吨,减产3.9%。茶叶产量114万吨,增产10.9%。 全年肉类总产量6800万吨,比上年减少3.5%。其中,猪肉减少9.2%;牛、羊肉分别增长6.1%和5.8%。全年水产品产量4737万吨,增长3.3%。全年木材产量6974万立方米,增长5.5%。 全年新增有效灌溉面积107万公顷,新增节水灌溉面积136万公顷。
下列哪种作物在2007年产量没有增加( )
A.棉花
B.糖料
C.茶叶
D.烤烟