若变量满足约束条件且的最大值为,最小值为,则的值是( ) (A) (B) (C) (D
用括号中单词的适当形式填空。 1.Let’s go ___________(shop)now,Mary. 2.Look! A tiger is running after some ____________(sheep) 3.How many ___________(hour)do you sl
病毒是一类特殊的生物,因为病毒没有______结构。
p{font-size:10.5pt;line-height:150%;margin:0;padding:0;}td{font-size:10.5pt;}(08安徽江南十校二模)据报道,一种由甲醇和氧气以及强碱做电解质溶液的新型手机电池,
下列关于种群的表述,正确的是( ) ①生殖前年龄组个体数大于生殖后年龄组个体数种群数量一定增长 ②没有迁出和迁入时,出生率大于死亡率,种群
—What do you think of the plan? —Oh,it’s OK.But I have to________ it with my parents. A.make B.discuss C.prepare D.start
—When on earth will the bus come?We have been waiting here for what seemed long ages. —Look,________. A.there comes the bus