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【单选题】
在坡口中留钝边是为了防止烧穿，钝边的尺寸要保证第一层( )。A.
焊缝变形小
B.
焊缝没有缺陷
C.
焊缝凝固快
D.
焊缝能焊透
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举一反三
【简答题】标高投影的三要素有 、 、 。
【单选题】The Yangtze River is almost the Pearl River.
A.
twice longer than
B.
longer twice than
C.
twice length of
D.
as twice long as
【简答题】The Yangtze River is the longest river in China . (保持句意基本不变) The Yangtze River is ________ ________ any other river in China.
【简答题】The Yangtze River is the river in China.
【单选题】Yangtze River is first longest river in China.
A.
the, the
B.
a, the
C.
a, a
D.
the, a
【判断题】The Yangtze River is the longest river in China and the Yellow River is the second longest river in China.
A.
正确
B.
错误
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