【单选题】【消耗次数:1】
Although they plant trees in this area every year, the tops of some hills are still ______.
blank
hollow
vacant
bare
参考答案:
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相关题目
【单选题】 — Its very windy and dusty in Beijing . —Well, more trees______ every year to stop the wind and sand.
①  should plant
②  should planted
③  can planted
④  must be planted
【单选题】 14.We should plant trees on _______ side of the road.
①  each
②  some
③  every
④  many
【单选题】 Although the weather was very bad, the buses still ran on ____.
①  time
②  plan
③  schedule
④  arrangement
【判断题】 Thousands of trees?were planted?last year.
①  正确
②  错误
【单选题】 Every year, one student in our high school wins a scholarship that ____one year of college.
①  improves
②  subsidizes
③  obliges
④  inflicts
【判断题】 In some countries girls are still ___deprived___ of a good education.
①  正确
②  错误
【单选题】 16.-This dress was last year’s style. -I think it still looks perfect ______ it has gone out this year.
①  so that
②  even though
③  as if
④  ever since
【单选题】 Niagara Falls is a great tourist _____, drawing millions of visitors every year.
①  attention
②  attraction
③  appointment
④  arrangement
【单选题】 There are some areas which are still densely populated ____ their severe weather conditions.
①  due to
②  with regard to
③  regardless of
④  but for
【单选题】 Would you like some more coffee? There’s still _______ left.
①  a few
②  few
③  a little
④  1ittle
随机题目
【判断题】 楔键的顶底面是工作面。
①  正确
②  错误
【判断题】 圆柱齿轮传动适用于中心距较大的场合。
①  正确
②  错误
【单选题】 平带传动,是依靠()来传递运动的。
①  主轴的动力
②  带与轮之间的摩擦力
③  主动轮的转矩
④  以上均不是
【判断题】 惰轮不但能改变轮系齿轮传动方向而且能改变传动比。
①  正确
②  错误
【判断题】 在多级传动中,常将带传动放在低速级。
①  正确
②  错误
【单选题】 带传动在工作时产生弹性滑动,是因为
①  带的初拉力不够
②  带的紧边和松边拉力不等
③  带绕过带轮时有离心力?
④  带和带轮间摩擦力不够
【单选题】 圆锥齿轮的标准参数在()
①  大端面
②  小端面
③  法面
④  中性面
【判断题】 定轴轮系的传动比等于始末两端齿轮齿数之反比。
①  正确
②  错误
【判断题】 螺纹联接是可拆联接。
①  正确
②  错误
【判断题】 带传动中紧边与小轮相切处,带中应力最大。
①  正确
②  错误