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【单选题】
焊接热影响区的存在使焊接接头 。A.
塑性增加
B.
弹性增高
C.
脆性增加
D.
刚性增加
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
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皮皮学刷刷变学霸
举一反三
【简答题】________ the earth to be flat, many feared that Columbus would fall off the edge of the earth. A) Having believed B) Believing C) Believed D) Being believed
【单选题】What causes the Earth to be warmer according to the video clip ?
A.
The atmosphere .
B.
The greenhouse gases .
C.
The sunbeams.
D.
The radiation from the outer space.
【单选题】Many early Europeans, ________ the earth to be flat, feared that Columbus would fall off the edge of the earth.
A.
believing
B.
having believed
C.
believed
D.
to believe
【单选题】急性肺水肿的典型症状和体征是
A.
胸闷,发绀,双肺满布干啰音
B.
胸闷,心悸,双肺满布湿啰音
C.
咯粉红色泡沫,双肺满布湿啰音
D.
胸闷,心悸,心前区闻及响亮持续的水泡音
E.
咯粉红色泡沫,心前区闻及响亮持续的水泡音
【单选题】_________ the earth to be flat, many feared that Columbus would fall off the edge of the earth.
A.
Having believed
B.
Believed
C.
Believing
D.
Being believed
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