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【单选题】
药皮熔化后形成熔渣，碱性焊条熔渣的主要成分为（ ）。A.
二氧化硅
B.
二氧化钛
C.
氧化铁
D.
萤石
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皮皮学刷刷变学霸
举一反三
【简答题】按正确顺序排列下列句子。 ( ) First, make a big ball of snow. ( ) Third, make a smaller snowball than the second and put it on the top. ( ) Let's make a snowman. ( ) Then make a face and a nose on ...
【简答题】You can make it much smaller when you put it away.
【简答题】make smaller or fewer
【判断题】滤室是吸收大量汁液昆虫的一种适应性构造,它可使过多水分及其他物质直接从消化道前端排入中场的后端或排入后场,而食物主要成养分则变得较为浓缩,通过中肠时容易被消化和吸收
A.
正确
B.
错误
【单选题】His father, who is said to be teaching in Australia, ____ in Nanjing University for more than 10 years.
A.
has worked
B.
had worked
C.
worked
D.
has been working
【简答题】Directions : In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage...
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