皮皮学,免费搜题
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【单选题】
This book will show you ________ can be used in other contexts.
A.
how you have observed
B.
how what you have observed
C.
that you have observed
D.
how that you have observed
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【简答题】氢气是未来最理想的能源,科学家最近研制出利用太阳能产生激光,并在二氧化钛(TiO 2 )表面作用使海水分解得到氢气的新技术:2H 2 O 2H 2 ↑+O 2 ↑。制得的氢气可用于燃料电池。试回答下列问题 (1)水分解时,断裂的化学键为________键(填离子或共价),分解海水的反应属于________反应(填放热或吸热)。 (2 )某种氢氧燃料电池是用固体金属化物陶瓷作电解质,两极上发生的电极...
【多选题】我国最早的礼仪学专著有( )
A.
《周礼》
B.
《仪礼》
C.
《论语》
D.
《大学》
E.
《礼记》
【判断题】The overall objective of inventory management is to achieve satisfactory levels of customer service while keeping inventory costs reasonable.
A.
正确
B.
错误
【单选题】The United Kingdomis the______most populous country, with an estimated 66 million inhabitants in 2017.
A.
12th
B.
22nd
C.
2nd
D.
20th
【多选题】我国最早的礼仪学专著有 ( )
A.
《周礼》
B.
《论语》
C.
《仪礼》
D.
《大学》
E.
《 礼记》
【单选题】--- Both Li Lei and Han Meimei _______ fond of the TV program A Bite of China. ---- I am also deeply moved by its stories.
A.
is
B.
am
C.
was
D.
are
【简答题】农田、园林的喷灌装置一边喷水一边旋转,这是因为喷口的朝向稍有偏斜,水从喷口喷出时,弯管因反冲而旋转,这样可以自动改变喷水的方向。这里运用了 。(选填“动量守恒定理”或“动能定理”)
【单选题】_____ may reduce overall GHG emissions by about 13%, while that figure is around 88% or greater for cellulosic ethanol.
A.
Corn ethanol
B.
Corn
C.
ethanol
D.
fossil fuels
【多选题】新媒体时代广告的新特点有( )
A.
互动性
B.
海量性
C.
多样性
D.
变化性
【单选题】The report written by the marketing department showed that overall prices are up 7.5%_____the previous quarter.
A.
while
B.
since
C.
during
D.
within
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