煤的结构很复杂,是以()为主具有烷基侧链和含氧、含硫、含氮基团的高分子化合物。
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单体铅酸蓄电池放电终止电压1.8V。
A. 正确
B. 错误
According to the passage, during the tests,()
A. the rudder should be moved through its full extent
B. the rudder should be moved in starboard direction
C. the rudder should be moved with the ship at maximum speed
D. the rudder should be moved with the ship at minimu
拖把清洁病室时建议不超过3间病室或使用间隔不超过60分钟()
A. 正确
B. 错误
五年外非普通住宅现购房价低于原购房价格可以免营业税和个税。
A. 正确
B. 错误