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道路清扫车的游动吸管是另一种附加的吸口,可在垃圾箱两侧和后方大范围内( ),用于拾取隔离绿化带或路肩边沟以及竖井内的垃圾,扩展了清扫机的作业范围;
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举一反三
【简答题】Study the following compound adjectives and then choose a suitable one for each of the blanks in the given sentences: ill-fitting outstanding far-reaching everlasting good-looking high-sounding fast-g...
【简答题】(三) 完形填空: ( 共 10 小题;每小题 1 分,满分 10 分 ) All over the world people enjoy sports. Sports help people to keep 46 , happy and to live 47 . People play different s in winter and summer. 48 is good for sw...
【简答题】“奢靡之始，危亡之渐”，这一古语所体现的哲学原理是
【单选题】In a family where the roles of women and men are not sharply separated, notions of male superiority are hard to maintain. The pattern of sharing in tasks and in decisions makes for equality, and this【...
A.
by turns
B.
in turn
C.
at length
D.
in fact
【简答题】More than 25,000 years ago, the first men (1) (arrive)________ on the continent(大陆) of America. These red-skinned men (2) (be)________ Asians, who (3) (come)________ from the far North in search of f...
【单选题】一般的防火墙都可以保护计算机安全功能，下列描述不正确的是（）。
A.
可以限制他人进入内部网络，过滤掉不安全服务和非法用户
B.
防止入侵者接近防御设施
C.
不限定用户访问特殊站点
D.
为监视Internet安全提供方便
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