下列有关美国1787年宪法的评述，正确的是（ ）①体现了孟德斯鸠的分权理论 ②体现了中央集权的原则 ③反映了州权至上的精神 ④体现了
—How did your students express their thanks to you on Teachers’ Day?—A gift together with many flowers ________ sent to me.A. is B. are
23．阅读材料，按写作要求，写一篇不少于800字的议论文。 校训是广大师生共同遵守的基本行为准则与道德规范，它既是一个学校办学理念、治校精神
Everybody in the little town knew my first teacher, so we had no ____ finding his home. A. difficulties in B. difficulty with C. difficulty D. difficulty to
我们在学习历史的过程中，必须清楚哪些是史实，哪些是结论。下列属于“结论”的是 A.林则徐领导虎门销烟
(本题满分12分）正方形边长为4，、分别是、上的两个动点，当点在上运动时，保持和垂直，1.⑴证明：；2.⑵设，梯形的面积为，求与之间的函数关系式
Two thirds of the people in that village _____ very poor in the past. A. is B. are C. was D. were
中，自变量
的取值范围是 ▲ ． 