6个大小相同的正方形方块堆砌成一个长、宽、高分别为6dm，4dm，2dm的长方体，求组成这个长方体的每个小正方体的棱长．
已知向量，， （1）若⊥, 且－＜＜． 求； （2）求函数|＋|的单调增区间和函数图像的对称轴方程．
（江苏卷26）. The experiment has_________ the possibility of the existence of any life on that planet, but it does not mean there is no life on other planets. A. found out B. pointe
下列对古代希腊罗马政治制度的评述，正确的是( ) ①古希腊的民主政治中已初步体现出主权在民、集体统治和任期制等民主特征 ②古希腊的民主
阅读下面短文，根据短文内容完成表格中所缺信息，每空一词。 Everyone has his or her dream school life．My dream school life is perfect（完美的）and colourful． First o
Once upon a time, there was a tortoise(乌龟) on a ship. Unluckily, the ship went down one day. Some time later the tortoise successfully swam to a land. There was nothing to eat on the land
有10件产品，其中有2件次品，从中随机抽取3件，求： (1)其中恰有1件次品的概率；(2)至少有一件次品的概率、
若角α的终边与角β的终边关于直线y=x对称则α+β等于( )A.2kπ,k∈Z B.2kπ+π,k∈Z C.2kπ D.+2kπ,k∈Z
