题目

欲除去铁粉中混有的少量铝粉，应选用的试剂的是：（   ） A．稀盐酸        B．稀硝酸        C．氨水       D．氢氧化钠溶液 答案：Dtake the leadtake on a new challengeimpress... withfall behindpioneerconnect ...toto high standardswin high praisedevote ... tochiefHave you dreamt of flying to the Moon? Have you dreamt of building a "bridge" (1)_____________________ theMoon _____ ._________ the Earth? These dreams may come true in the near future."I wish we could travel further away," said Ouyang Ziyuan, the (2)_____________________ scientist of China'smoon programme. He is also a<3)__________________ in the field of astrochemistry (天体化学)in China. In the1990s, Ouyang Ziyuan and his team (4)__________________ and started the Chinese moon programme. He saidthe Moon is important to human's future and China should not(5)_____________________ other countries in probing(探测)the Moon. They <6)_________________ all of their time__________________ the programme and worked一____ . On 24 October 2007, Chang'e 1 flew into space. Doctor Ouyang and his team(8)________________ from the whole country. They also <9)___________________ the whole world_______________ their outstanding work. Now, China is expected to (10)____________________ in this field in the 2020s.