【单选题】【消耗次数:1】
3. This English song___ by the girls after class.
often sings
often sang
is often sang
is often sung
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相关题目
【单选题】 This English song___ by the girls after class.
①  often sings
②  often sang
③  is often sang
④  is often sung
【判断题】 She often looks after her grandmother.
①  正确
②  错误
【单选题】 We often hear students ______ English at school.
①  A. practiced
②  B.practising
③  C.practise
④  D.were practising
【单选题】 Does Tim often play [填空] basketball after [填空] school?
①  /,/
②  /,the
③  the,/
④  a,//
【多选题】 A: How often do you usually exercise?B:_______________ .
①  Every morning
②  Once a day
③  Twice a week
④  Very often
【单选题】 In the past he often made his sister___, but now he is often made __by his sister.
①  to cry; to cry
②  cry
③  to cry; cry
④  cry; to cry
【判断题】 They often climing the mountainl.
①  正确
②  错误
【多选题】 In his spare time, he often _______.
①  A.speak English
②  B.rides a bike
③  C.cycles
④  D.goes cycling
【判断题】 He often attends public lectures at the university of California chiefly to improve his English.
①  正确
②  错误
【单选题】 I often go to work on [填空].
①  foot
②  feet
③  foots
④  feets
随机题目
【单选题】 气相使陶瓷的()
①  强度降低
②  断裂韧性降低
③  半透明性升高
④  力学性能变差
⑤  以上均正确
【单选题】 陶瓷材料显微结构通常有()三种不同的相组成。
①  液相,气相,固相
②  液相,晶相,玻璃相
③  气相,玻璃相,晶相
④  气相,晶相,固相
⑤  液相,气相,晶相
【单选题】 可用于钛合金烤瓷修复体制作的陶瓷材料是()
①  高熔陶瓷
②  中熔陶瓷
③  低熔陶瓷
④  超低熔陶瓷
⑤  以上均可
【单选题】 较理想的铸造玻璃陶瓷材料一般要求其()
①  晶粒含量多,晶粒尺寸小
②  晶粒含量少,晶粒尺寸大
③  晶粒含量少,晶粒尺寸小
④  晶粒含量多,晶粒尺寸大
⑤  晶粒含量多,与晶粒尺寸无关
【单选题】 高熔陶瓷的熔融温度为()
①  1000~1100℃
②  1100~1200℃
③  1200~1450℃
④  1450~1550℃
⑤  1550~1650℃
【单选题】 下列陶瓷原料中()含氧化铝最高。
①  高岭土
②  叶腊石
③  长石
④  膨润土
⑤  含量一致
【单选题】 超低熔陶瓷的熔融温度为()
①  <550℃
②  <650℃
③  <750℃
④  <850℃
⑤  <950℃
【单选题】 为增强金瓷结合,其方法有很多,除了
①  预氧化
②  喷砂
③  超声清洗
④  除气
⑤  电解蚀刻
【单选题】 金属烤瓷材料与金属的主要结合力是
①  机械结合力
②  物理结合力
③  压力结合力
④  化学结合力
⑤  范德华力
【单选题】 口腔烧结全瓷材料的主要成分是()
①  石英
②  长石
③  硅石
④  氧化铝
⑤  白陶土