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【多选题】
CO2 焊产生 N2 气孔的原因有 。A.
CO2气体流量过小
B.
喷嘴至工件距离过大
C.
工件表面有铁锈
D.
工件表面有油污
E.
CO2气体中水分多
F.
喷嘴被飞溅物堵塞
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【简答题】When did Miss Barton retire from the leading office of the Red Cross in the U. S. ?30：When did Miss Barton retire from the leading office of the Red Cross in the U. S. ?
【多选题】根据我国《民法总则》的规定,下列各项中,属于无效民事行为的有( )。
A.
不满八周岁的丫丫自己决定将压岁钱 500 元赠给希望工程
B.
李某因认识上的错误为其儿子买回一双不能穿的鞋
C.
甲公司的业务员黄某得到乙企业给予的回扣款 1000 元，并代理甲公司向乙企业购买了 10 吨劣质煤
D.
丙公司向丁公司转让一辆无牌照的走私车
【单选题】Which of the following details is INCORRECT?
A.
The international Red Cross and Red Crescent Movement have gained a third emblem.
B.
The new emblem opened the way for Israel to join the global relief network.
C.
A two-thirds majority adopted a diamond-shaped white crystal on a red background as the new symbol.
D.
A U.S. governor advisor at the talks says he was pleased with the outcome.
【单选题】How much is the Red Cross trying to raise for survivors of Haiti’s earthquake?
A.
100 million dollars.
B.
22 million dollars.
C.
120 million dollars.
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