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【简答题】
用所给词的适当形式填空 小题1:–What____________(be)your father? --He__________(be) a worker . 小题2:Lily often___________(study) English in her free time. 小题3:Do you enjoy_____________(listen) to music？ 小题4:I like swimming. It___________(make) me happy. 小题5:Let me____________(show) you around our school. 小题6:Our school___________(start) at eight in the morning. 小题7:I play basketball____________(two) a week. 小题8:This is Kitty. __________ loves dancing. We all love__________(she).
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【单选题】对于配位聚合生产出来的聚丙烯下列说法错误的是
A.
聚丙烯(PP)是用Zigler-Natta催化剂聚合制得的具有高结晶度和高熔点热塑性高分子材料
B.
机械性能好
C.
有毒
D.
容易加工成型、原料易得、价格低廉
【简答题】Our environment ______ (get)worse and worse with the increase of the world population．
【简答题】A—United Nations Environment Programme B—World Health Organization C—World Meteorological Organization D—World Trade Organization E—World Intellectual Property Organization F—World Peace Council G—Int...
【简答题】中国环境标志标志是一种什么型标志?其寓意是什么?
【单选题】在家鼠中,花毛基因是 X 连锁遗传,而且对正常毛是显性,如果一正常毛色雌鼠与花毛雄鼠杂交,下列 正确(雌鼠是同配性别)
A.
F 1 代中所有雌鼠都是花毛，但 F 2 代中无一只花毛雌鼠
B.
由于花毛是由显性基因控制的，所以 F 1 代的个体都应是花毛
C.
F 1 代中毛色表型比率相同， F 2 代中花毛：正常毛 =1 ： 1
D.
由于无法解释亲本是纯合体还是杂合体，故不能回答这个问题
【单选题】Environment and Health Issues We are living in a hostile world: depletion of ozone (臭氧) layer, global warming, air pollution, worldwide transmission of AIDS.... The fact that these environmental and h...
A.
Y
B.
N
C.
NG
【简答题】World Wildlife Fund (WWF)'s goal is to save the world's environment. The organization was set up ___21__September 11，1961. In the beginning, WWF worked __22__ the world's wildlife. Now, it works to sa...
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