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【多选题】
有关吸尘器的维护和保养的叙述,正确的有A.
每次使用前应检查集尘箱（筒）内是否清洁干净
B.
有集尘指示器的吸尘器，不能在工作
C.
如果吸尘器不是干湿两用机，则不能用来吸液体、黏性物、金属粉末、较大体积物体
D.
定期更换轴承润滑油
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】Dell's distribution strategy is best described as
A.
a brick-and-mortar strategy.
B.
a shared service mall strategy.
C.
a click-and-mortar strategy.
D.
direct marketing from a manufacturer.
【简答题】Real Networks shows great focus on the strategy of doing your best．
【单选题】What is the best strategy adopted when people attend the conference alone?
A.
“Talk to random people” strategy.
B.
“One-to-one talk” strategy.
C.
“Keep smile” strategy.
D.
“Face-to-face communication” strategy
【单选题】Which of the following is the best strategy in guiding students to comprehend an essay?
A.
Asking them questions before they read it.
B.
Helping them focus on the critical passages.
C.
Giving them additional time to study it.
D.
Teaching them to use reading strategies combinedly.
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