During an 1899 F4 tornado (龙卷风) in Missouri, three people, Miss Moorehouse, Mrs. Webster, and her son were caught up in the storm. They 61 (carry) nearly one mile, but were let down so
现在人们对人与气候的关系有了新的认识：既是互动的，也应该是友好的。从哲学角度看，这表明
有关能源问题，下列说法不正确的是A．风能是常规能源B．化石能源是不可再生能源C．太阳能是新能源D．教室内空气会自行聚拢到某一角落
脆甜可口的冬枣肉、香香的西瓜籽、营养丰富的玉米粒分别是由下列哪项发育而来的 （ ） A．子房、子房壁、胚珠B．子房、胚珠、子房壁C．子房壁、
It was Monday. Mrs. Smith's dog was hungry, but there was not any meat in the house. Considering that there was no better way. Mrs. Smith took a piece of paper, and wrote the following words on it,
某有机物链状分子中含n个, m个, a个,其余为羟基。则该有机物分子中羟基的个数为( ) A. 2n+3m-a B. n+m+a C. m+2-a D. m+2n+2-a
如果复数 (其中为虚数单位，为实数)的实部和虚部互为相反数，那么等于 （ ） A． B． C．
甲、乙、丙三家超市为了促销一种定价相同的商品，甲超市先降价20%，后又降价10%，乙超市连续两次降价15%，丙超市一次降价30%.那么顾客到哪家购买更
以及直线y=1所围成的封闭图形的面积是 ．
