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【简答题】
常见的黄铜是指铜和（）的合金，而青铜的种类较多，主要有锡青铜，铝青铜等，青铜在大气，海水中的耐蚀性（）于黄铜.
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皮皮学刷刷变学霸
举一反三
【单选题】Who first showed that germs caused disease?
A.
Edward Jenner.
B.
Lady Montague.
C.
Louis Pasteur.
D.
Robert Koch.
【简答题】In 1796, the scientist, Edward Jenner ___________ material
【多选题】下列自由形状功能的哪些有相切控制
A.
直纹面 (Ruled surface)
B.
过曲线网格 (Through curve mesh)
C.
过曲线 (Through curves)
D.
扫描
【简答题】过曲线网格特征（Through Curve Mesh）最多可以选择（）条主曲线线串和（）条交叉曲线线串。
【单选题】How did Dr. Edward Jenner solve the problem of smallpox?
A.
He kept on focusing on people who had smallpox.
B.
He changed his way of thinking by turning to people without smallpox.
C.
Dairymaids advised that he use cowpox to experiment.
D.
He happened to discover cowpox and he experimented with it on dairymaids.
【单选题】The famous Dr. Edward Jenner was busy trying to solve the problem of smallpox. After studying case after case, he still found no possible cure. He had reached an impasse in his thinking. At this point...
A.
deadened
B.
depression
C.
solution
D.
peak
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