钒是一种熔点很高的金属，具有良好的可塑性和低温抗腐蚀性，有延展性、硬度大，无磁性。广泛应用于钢铁、航空航天、能源、化工等领域。中铝集
Her face went red _____ he had said. A. because that B. because what C. because of what D. because
如果执行右侧的程序框图，那么输出的S的值为（ ） A．2450 B．2550 C．2500 D．2652
Just as the doctor _________, your wife is not exactly fat, but rather well-built for her age． A．gets it B．makes it C．means it D．puts it
阅读下面文言文，完成下面题目。(10分) 郭琇劾明珠康熙间，山左名臣，自李之芳、董讷而下，实以郭瑞卿为最刚正。瑞卿名琇。当明珠柄政时行为专
一遥控玩具小车在平直路上运动的位移—时间图象如图,则 ( )A.15 s末汽车的位移为300 mB.20 s末汽车的速度为-1 m/sC.前10s内汽车的加速度为3 m/s2 D.前25
Green is an important color in nature. It is the color of grass and the leaves on trees. It is also the color of most growing plants. Sometimes, the word green means young, fresh and growing. Som
向量，．设函数． 求函数的最小正周期及时的最大值．
