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【简答题】
A. dispersed B. fixture C. decentralized D. frugality E. administrate F. elapse G. Reviving H. disjointed I. exquisite J. deduce A considerable period of time has to _____1______ before the effects of such security measures as closed-circuit television cameras and cell-phone monitoring become evident in reducing crimes. As the sun _____2______ the clouds, we enjoyed our afternoon of playing cards in the forest under the clear sky and observing the most spectacular view I have ever seen in my life. He calls on the public to save in everyday life and believes that _____3______ is the key to battling a culture that rewards mindless consumption. _____4______ the stalled economy and sticking to promises to bring the deficit down next year is proving to be the principal test for the new president. It is not easy to ______5_____ a trend of growth from the available facts since they are quite scarce and not that convincing.
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举一反三
【简答题】已知复数 z 1 =1- 3 i ,若复数z满足条件(|z 1 |+z)?z 1 =1,则z=______.
【简答题】(6空)合成橡胶是用化学合成方法生产的高弹性体,经硫化加工可制成各种橡胶制品。根据产量与使用情况可分为 、 两大类,前者主要代替部分天然橡胶生产轮胎、胶鞋、橡皮管等橡胶制品,包括丁苯橡胶、 、 、 、 异戊橡胶等品种,后者主要制造耐热、耐老化、耐油或耐腐蚀等特殊用途的橡胶制品,包括氟橡胶、 、 氯丁橡胶、丁腈橡胶、聚氨酯橡胶、氯醇橡胶等。
【判断题】QAM信号可以看作两个相互正交的振幅键控信号之和。
A.
正确
B.
错误
【单选题】若复数Z 1 =i,Z 2 =3-i,则 Z 2 Z 1 =(  )
A.
1+3i
B.
2+i
C.
-1-3i
D.
3+i
【简答题】若复数 z= 2i 1-i ,则 | . z +3i| =______.
【简答题】若复数z满足i·(3+z)=-1(其中i为虚数单位),则z=(    )。
【单选题】精量播种与普通播种相比的优点之一是( )。
A.
不用选种
B.
节省种子
C.
株距均匀
D.
行距均匀
【简答题】超高温瞬时杀菌
【判断题】跟内控型相比,外控型的人更可能成为团队领导者。()
A.
正确
B.
错误
【多选题】铰孔时,选择铰削余量不宜太大或太小,如太小则使()。
A.
孔的形状呈多边形
B.
铰刀容易磨损
C.
孔径上大下小呈锥形
D.
上道工序加工刀痕和残留变形难以消除
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