【单选题】【消耗次数:1】
10. ______, he was unable to make much progress.
Hard as he tried
Though hard as he tried
He tried hard
Because he tried hard
参考答案:
复制
纠错
相关题目
【单选题】 ____ he tried his best , he still failed the examination.
①  Although
②  Even although
③  However
④  Because
【单选题】 _______ he tried his best, he still failed the examination.
①  Although
②  Even although
③  However
④  Because
【单选题】 He tried to _______relations with his former wife but he failed.
①  measure
②  maintain
③  shelter
④  reply
【单选题】 We tried to ____ what he meant.
①  make for
②  make out
③  make of
④  make from
【单选题】 he tried [] but failed to finish his work in time.
①  hard
②  hardly
【单选题】 Had he worked hard, he _____ the exams.
①  must have got through
②  would have got through
③  would get through
④  could get through
【单选题】 19. He tried to _____ from his memory what he knew of his former neighbor..
①  think of
②  remember
③  summon
④  gave way
【单选题】 He found it hard to ( ) his studies in such a noisy environment.
①  devote to
②  dwell on
③  concentrate on
④  depend on
【单选题】 The boy worked hard ______ he could get the prize.
①  so that
②  so as to
③  so as
④  in order to
【单选题】 One can’t learn a language well, ________ he works hard.
①  if
②  and
③  unless
④  because
随机题目
【单选题】 齿条插刀的分度线也称为( )
①  齿条插刀中线
②  齿条插刀顶线
③  齿条插刀刀顶线
④  齿根线
【单选题】 斜齿轮的端面模数与法面模数( ),但端面齿高与法面齿高却是一致的
①  大于
②  等于
③  不等
④  小于
【单选题】 蜗杆传动特点包括( )
①  传动比大,结构紧凑
②  传动平稳,噪声小
③  可以实现自锁
④  以上全部正确
【单选题】 圆弧齿圆柱蜗杆传动的蜗杆外形仍然是圆柱形螺杆,但在传动的主平面内,蜗杆齿廓是( )弧形,而蜗轮齿廓是凸圆弧形
①  凹圆
②  长方
③  正方
④  梯形
【单选题】 轮系的主要功用( )
①  可作距离较远的传动
②  实现变速与换向
③  可获得大的传动比
④  以上全部正确
【单选题】 谐波传动装置的缺点( )
①  BC为正确答案
②  对柔轮的材料性能,加工精度和热处理要求高
③  只适用于体积小,重量轻的传动装置中
【单选题】 渐开线少齿差行星传动中,两轮齿数差越( ),传动比越大
① 
②  相似
③ 
【单选题】 ( )传动是两个互相直接接触的回转体在外加压力的作用下,靠接触点处的摩擦力传递转矩的
①  机械无级变速
②  渐开线少齿差行星
③  摩擦轮
④  谐波齿轮传动
【单选题】 滚珠螺旋传动是在螺杆和( )的螺纹槽之间连续填装滚珠作为滚动体,使得螺杆和螺母间滑动摩擦变成滚动摩擦。
①  螺矩
②  螺母
③  螺纹
④  螺旋
【单选题】 静压螺旋传动的特点( )
①  寿命长
②  刚度大
③  以上为正确答案