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不法商往往以制造假冒商品来牟取暴利，在市面上经常能看到①用铜戒指冒充金戒指；②用铝制工艺品冒充银制工艺品；③用化纤毛线冒充纯毛毛线．怎样用化学方法来鉴别它们的真假． （1）戒指：______； （2）工艺品：______； （3）毛线：______．
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皮皮学刷刷变学霸
举一反三
【单选题】听力原文：W: Are you coming to Jo's housewarming party on Saturday? Susan is going to give me a ride to the party. M: How could she? She doesn't have her licence yet. Q: What does the man mean? (13)
A.
Susan should not be driving.
B.
Susan is not going to the party.
C.
Susan is not a driver.
D.
Susan is not kind enough to give the woman a ride.
【单选题】听力原文：M: Did you invite Ben to the party? W: He's away at a conference until tomorrow. What does the woman mean?
A.
Ben will be the party.
B.
He is at a conference tomorrow.
C.
She's been unable to invite Ben.
【单选题】听力原文：W: How about your party last week? M: It was pretty successful and not a single friend was absent. Q: What does the woman mean? (16)
A.
One friend was absent from the party.
B.
All her friends were present at the party.
C.
Not all her friend participated in the party.
D.
All her friend took partners to the party.
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