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【简答题】
What does Sam's dad suggest Sam do?
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【简答题】粗食盐提纯过程中过滤操作有 次。(请填入阿拉伯数字)
【单选题】If you had told me in advance, I_______ him at the airport. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
would meet
B.
would had met
C.
would have met
D.
would have meet
【简答题】某兴趣小组进行粗盐提纯并配制NaCl溶液，请回答下列问题： （1）操作①、②、③依次为下图中的（填字母） 。 （2）若实验最终所得NaCl晶体偏少，则可能的实验原因是（填字母）。 A．过滤时滤纸有破损 B．蒸发时有固体溅出 C．溶解含有泥沙的粗食盐时，加入的水量不足 （3）在得到食盐固体的过程中，当_____出现时，就要停止加热。 （4）若用以上操作得到的食盐配制100g 10%的氯化...
【单选题】If one of your research staff announced that he had worked out a way to propel a vehicle on a cushion of air, would you tell him to concentrate on something practical, or suggest taking it further? If...
A.
this allows it to promote innovative products
B.
this enables it to stay ahead of its rivals
C.
they are very flexible about their working hours
D.
their talents are ideally suited to the market
【简答题】粗盐中含有较多的可溶性杂质（氯化镁、氯化钙等）和不溶性杂质，回忆我们曾经做过的粗盐提纯的实脸。 （1）粗盐提纯有如下步骤： ①计算产率 ②过滤 ③溶解解 ④蒸发 正确的操作顺序是 （填编号），操作过程中使用次数最多的仪器是 （填字母）。 A．漏斗 B．蒸发皿 C．玻璃棒 D．酒精灯 （2）最后得到的精盐属于 （填“混合物”或“纯净物”）。 （3）实验结束后，有4个小组分别展示了计算的精盐产率： 老...
【简答题】质量管理体系认证程序主要依据是( )
【简答题】(M=Man W=Woman) W: If you had one million dollars, what ___________ you do? M: I would buy a small island, build a house there, and invest the rest of my money so that I would never have to ________...
【单选题】---Did you meet with the famous space hero, Yang Liwei? ---_____ I had come here earlier.
A.
If only
B.
Only if
C.
But for
D.
Despite
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