【多选题】合成氨中,关于甲烷化反应的催化剂的表述正确的是
A.
活性组分为Ni ; 载体为氧化铝、硫酸钙水泥或高岭土;促进剂和稳定剂为MgO、Cr2O3。
C.
较低温度时,富含CO会形成Ni(CO)4;羰基Ni在较高温度下不断挥发,使触媒有效成分降低。
D.
S达0.1ppm,催化剂寿命从5年 下降到1年以下
【简答题】坚决打赢脱贫攻坚战,要坚持大扶贫格局,注重扶贫同扶志、扶智相结合,深入实施东西部扶贫协作,重点攻克深度贫困地区脱贫任务,确保到 二〇二〇 _ 年我国现行标准下农村贫困人口实现脱贫,贫困县全部摘帽,解决区域性整体贫困,做到 ________________ 。
【多选题】The Ancient Building Complex ar e made of different materials in various structure such as __________.
B.
the Ancient Bronze Shrine
C.
the stone-walled Forbidden City
D.
the stone Nanyang Palace
E.
the wooden Purple Heaven Palace . prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【判断题】设A、Q为实空间中矩阵,且有Q^TQ=I,则有||A||2=||QA||2。()
【单选题】Mr. Barlow thought he could be 'sincere' about selling Warman's office materials because ______.
A.
Warman's would pay him well to sell their materials
B.
Warman's materials were known to be of high quality
C.
he was used to selling them, so knew how to do it
D.
he would not have to sell direct to housewives
【简答题】要 获取 创造对象的 类 ,我们用_____方法。 获取父类用______方法。(注意大小写和加"()")
【单选题】Olivia:Do you mind if I play some music? Bill:______. I'm writing my assignment.
【简答题】第二节 课内语法填空 A My life is a lot easier at high school because my fellow students have accepted me. The few 56 cannot see the real person inside my body do not make me 57 (annoy), and I just ignore them....
【简答题】坚决打赢脱贫攻坚战,要坚持大扶贫格局,注重扶贫同扶志、扶智相结合,深入实施东西部扶贫协作,重点攻克深度贫困地区脱贫任务,确保到___________年我国现行标准下农村贫困人口实现脱贫,贫困县全部摘帽,解决区域性整体贫困,做到_______、_______。