答案查看网,轻松搜题/搜资源
登录
×
登录账号
记住密码
立即注册
忘记密码
×
注册
使用微信扫描二维码,获取账号密码后免费查看答案
前往登录
忘记密码
×
忘记密码
使用微信扫描下方二维码,即可找回您的账号密码
前往登录
立即注册
搜题/搜资源
【单选题】【消耗次数:1】
15.The book was so interesting that he had read it for three hours ______ he realized it.
①
when
②
until
③
after
④
before
参考答案:
复制
纠错
➡️如需代学继续教育,请点击这里
相关题目
【单选题】
It was not until he arrived in class _____ realized he had forgotten his book.
①
when he
②
that he
③
and he
④
he
查看完整题目与答案
【判断题】
Before he began to study in the university, he had worked in a company for three years.
①
正确
②
错误
查看完整题目与答案
【单选题】
After failing the exams three times, Jack realized that he’d never ____in English.
①
see to it
②
attain it
③
catch it
④
make it
查看完整题目与答案
【单选题】
The letters for the boss __________ on his desk but he didnt read them until three days later.
①
were put
②
was put
③
put
④
has put
查看完整题目与答案
【单选题】
He has left his book here on___, so that you can read it.
①
purpose
②
intention
③
aim
④
meaning
查看完整题目与答案
【单选题】
Before?he came to China, he??[填空]Chinese for three years.
①
have learned
②
had learned
③
learned
④
learning
查看完整题目与答案
【单选题】
20. Only when he had handed in his exam paper ____ he had made several mistakes.
①
he has realized
②
does he realize
③
has he realized
④
did he realize
查看完整题目与答案
【单选题】
He looked at the little girl, _________ where he had seen her before.
①
wondering
②
wondered
查看完整题目与答案
【单选题】
Before he came to New York, he had never heard a single English word().
①
speak
②
to speak
③
spoke
④
spoken
查看完整题目与答案
【单选题】
His mother had talked to him for two hours while he was watching TV, but_____.
①
a little did he hear
②
little did he hear
③
little heard he
④
a little heard he
查看完整题目与答案
随机题目
【判断题】
当刃倾角λ<0时,切屑向工件的待加工表面方向流出。()
①
正确
②
错误
查看完整题目与答案
【判断题】
工序能力系数与被加工工件工序公差无关。()
①
正确
②
错误
查看完整题目与答案
【单选题】
高速钢刀具的主要磨损形式是()。
①
扩散磨损
②
粘结磨损
③
氧化磨损
④
机械磨损
查看完整题目与答案
【判断题】
工件材料的塑性越大,材料的切削加工性就越好。()
①
正确
②
错误
查看完整题目与答案
【判断题】
车削时为获得高的表面质量应采用中速切削。()
①
正确
②
错误
查看完整题目与答案
【判断题】
滚齿时,轴向进给传动链是内联系传动链。()
①
正确
②
错误
查看完整题目与答案
【单选题】
在C6140机床传动系统中,主轴属于()。
①
执行件
②
运动源
③
传动装置
④
传动件
查看完整题目与答案
【判断题】
当进给速度较大时,一般需要计算刀具的工作角度。()
①
正确
②
错误
查看完整题目与答案
【单选题】
设连续型随机变量的密度函数为,则当()时,为随机变量数学期望.
①
收敛
②
为有界函数
③
④
绝对收敛
查看完整题目与答案
【单选题】
为任意两事件,若之积为不可能事件,则称与()
①
相互独立
②
互不相容
③
互为独立事件
④
为样本空间的一个部分
查看完整题目与答案