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【多选题】
补强圈补强是工程上广泛采用的一种局部补强结构，关于补强圈补强，下面描述正确的是（）；A.
补强圈补强具有结构简单、制造方便、使用经验丰富的显著优点，因而得以广泛应用且不受压力、温度及载荷条件限制 ;
B.
补强圈补强结构存在“搭接不易贴合、抗疲劳性能差”等缺陷，因而 GB150 等相关标准对其应用有一定的限制；
C.
补强圈上一般开有 M10 的螺纹，其主要作用是通入压缩空气以检查补强圈与壳体连接焊缝致密性；
D.
补强圈结构补强设计的基本准则是等面积补强，即补足因开削弱的圆的表面积；
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举一反三
【单选题】Green is the color of _______ nature. And you can enjoy the colorful rainbow in _______ sky after the rain.
A.
the; the
B.
/; a
C.
/; the
D.
a; the
【单选题】Mr Green often says “what is learnt in the ______ lasts to the grave”, intending to impress on us the significance of reading more books while we’re young.
A.
brochure
B.
association
C.
encyclopedia
D.
cradle
【单选题】Mr. Green’s office is _______ the 26th floor. You can take the lift there.
A.
at
B.
in
C.
on
D.
for
【简答题】请将左侧单词与右侧释义连线。
【单选题】What does 'a green-fingered demographic' refer to in the 4th paragraph?
A.
Professional gardeners.
B.
People with green fingers.
C.
Amateur gardeners.
D.
Foreign gardeners.
【简答题】This is the Green family. Mr and Mrs Green are from England. They are both good English teachers. They teach English in a junior high school in China. They like their work a lot . They have two childr...
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