【单选题】【消耗次数：1】
Ifyoucannot____thepicturehangingonthewall,steponthechair
①
carry
②
hide
③
reach
④
take
参考答案：
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【简答题】
Fill in the blanks with the words or phrases given below. Change the form if necessary.[evaluate; expand; reveal; fertile; convince; impulse; reach; transfer; concrete; productive; take up; right away; fall asleep; back and forth; take advantage of; try to]3. Every term students are given the opportunity to[填空1]their instructors.
【简答题】
Fill in the blanks with the words or phrases given below. Change the form if necessary.[evaluate; expand; reveal; fertile; convince; impulse; reach; transfer; concrete; productive; take up; right away; fall asleep; back and forth; take advantage of; try to]9. What she said[填空1]me that I was mistaken.
【简答题】
Fill in the blanks with the words or phrases given below. Change the form if necessary.[evaluate; expand; reveal; fertile; convince; impulse; reach; transfer; concrete; productive; take up; right away; fall asleep; back and forth; take advantage of; try to]3. Every term students are given the opportunity to[填空1]their instructors.
【简答题】
Fill in the blanks with the words or phrases given below. Change the form if necessary.[evaluate; expand; reveal; fertile; convince; impulse; reach; transfer; concrete; productive; take up; right away; fall asleep; back and forth; take advantage of; try to]9. What she said[填空1]me that I was mistaken.
【单选题】
________the diamond,he had to look for a place to hide it.
①
Having stolen
②
Having been stolen
③
Stolen
④
Stealing
【单选题】
____ the diamond, he had to look for a place to hide it.
①
Having stolen
②
Having been stolen
③
Stolen
④
Stealing
【单选题】
4.____the diamond, he had to look for a place to hide it.
①
Having stolen
②
Having been stolen
③
Stolen
④
Stealing
【单选题】
Dieters should try to reach and __________ a reasonable weight.
①
contain
②
secure
③
reserve
④
maintain
【简答题】
Fill in the blanks with the words or phrases given below. Change the form if necessary.[evaluate; expand; reveal; fertile; convince; impulse; reach; transfer; concrete; productive; take up; right away; fall asleep; back and forth; take advantage of; try to]2. Thehours that a child plays incompany with his peers[填空1]his life space and provide him with experience in getting along with others.
【简答题】
Fill in the blanks with the words or phrases given below. Change the form if necessary.[evaluate; expand; reveal; fertile; convince; impulse; reach; transfer; concrete; productive; take up; right away; fall asleep; back and forth; take advantage of; try to]2. Thehours that a child plays incompany with his peers[填空1]his life space and provide him with experience in getting along with others.
随机题目
【单选题】
计算机电液控制系统除常规的液压传动系统以外，通常还有数据采集装置、信号隔断和功率放大电路、驱动电路、电-机械转换器、主控制器及相关的键盘及显示器等。该说法（ ）
①
正确
②
错误
【单选题】
液压系统点检的内容( )
①
所有液压阀、液压缸、管件是否有渗漏。
②
液压泵或液压马达运转时，是否有异常噪声。
③
液压缸运动全行程中是否正常平稳。
④
液压系统中各测压点压力是否在规定的范围内，压力是否稳定
⑤
液压系统中油液温度是否在允许范围内。
⑥
以上说法都正确
【单选题】
关于定期检查或更换密封件应考虑问题错误表述的是（ )
①
对重大流水线液压设备，在正常运行的周期内（一般为两年），不允许发生停机故障，否则给生产带来重大损失
②
对单机作业、非连续运行的液压设备（如工程机械类液压设备）可对检查有问题的密封件进行更换，有异常现象的一般不予以更换
③
对所使用的密封件材料性能、寿命、使用环境条件，要有深入了解，再制定出更换密封件的周期
【单选题】
试制液压设备调试阶段的故障如下（ ）
①
外泄漏严重，主要发生在接头和有关元件的端盖处
②
执行元件运动速度稳定。
③
液压阀阀芯卡死、运动灵活和运动到位，导致执行元件动作失灵。
④
压力控制阀的阻尼孔堵塞，造成压力稳定。
【单选题】
液压系统运行初期的故障液压系统经过调试阶段后，便进入正常生产运行阶段此阶段故障特征是 ( )
①
管接头因振动而松脱
②
密封件质量好，或由于装配不当而破损，造成泄漏
③
管道或液压元件流道内的型砂、毛刺、切屑等污染物在油流的冲击下脱落，堵塞阻尼孔和过滤器，造成压力和速度很稳定
④
由于负载大或外界散热条件差，油液温度过低，引起内外泄漏，导致压力和速度的变化