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【简答题】
解释下面梁平法施工图中平面注写方式的集中标注中各项符号的含义。 KL12 ( 5B ) 250×500 Φ 8@100/200 ( 4 ) 2 Φ 22+ ( 2 Φ 12 ) G4 Φ 12 - 0.100
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反馈参考答案：
举一反三
【单选题】下面关于金属钠的描述正确的是 ( )
A.
钠的化学性质很活泼，在自然界里能以游离态存在
B.
钠离子和钠原子都具有较强的还原性
C.
钠能把钛 、 锆等金属从它们的盐溶液中还原出来
D.
钠和钾的合金可做原子反应堆的导热剂
【单选题】下列有关金属的描述正确的是
A.
铝比铁活泼，铝更容易生锈
B.
多数合金的熔点低于组成它的成分金属
C.
可以用填埋法处理金属废弃物
D.
菜刀用湿布包起来可以防止生锈
【单选题】The shop assistant didn't give me the right______.
A.
change
B.
money
C.
serve
D.
note
【简答题】A．She isn't there in the morning. B．Her assistant isn't there in the morning. C．She won't have the forms he needs until the afternoon. D．She isn't as busy in the afternoon.
【简答题】A．She isn't as busy in the afternoon. B．She isn't there in the morning. C．Her assistant isn't there in the morning. D．She won't have the forms he needs until the afternoon.
【简答题】减压回路的主要核心元件是 阀。
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