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【判断题】
封闭环公差等于各组成环公差之和。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】装饰石材按照国家无机非金属装饰材料放射性指标限量标准划分为三类，下列说法不正确的是（ ）。
A.
A类使用范围不受限制
B.
B类可用于住宅建筑的内部饰面
C.
C类只可用于建筑外饰面
D.
B类可用于建筑物室外台阶饰面
【简答题】简述什么是长管、什么是短管。
【简答题】听句子，选择合适的答语。 ( ) 1. A. It's a red. ( ) 2. A. I feel tired. ( ) 3. A. They are talking. ( ) 4. A. They are blue. ( ) 5. A. His name is Li Ming. B. It's yellow. B. I cut my finger. B...
【简答题】口罩的原料主要是( )。
【单选题】---- I feel tired. I have so much work to do and don’t have much time for myself. ---- You should take____ ,I think.
A.
health
B.
exercise
C.
lesson
D.
time
【单选题】—________, David? You don't look well. —I have a fever and I feel tired. [ ]
A.
What are you
B.
What's the matter
C.
What's the wrong
D.
What's that
【单选题】— Where is it? — _________________ [ ]
A.
It's on the chair.
B.
I'm sad.
C.
I feel tired.
【单选题】---I feel tired. ---Why don’t you go to bed early for ___ nights?
A.
a few
B.
a little
C.
little
D.
few
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