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【简答题】
What was the news? 29th Jan., 1945 My dearest one, I’ve just heard the news that all the Army men who were held POW are to 1________ . Because of the shipping situation we may not commence to go before 2________ , but could probably count on being in England 3________ . It may be sooner. It has made me very warm inside. It is terrific, wonderful, shattering. I do not know how long leave I shall get. I could get as little as 14 days and I may get as much as 4________ . I’m wondering how I shall tell you I’m in England. Probably it’s still quicker to 5________ . And I hope to send you one announcing that I am on the same island. I will send another when I’m actually soon to get on 6________ and you can ring Lee Green 0509 when you think 7________ there. It’s a pity that 8________ will not be kind to us out of doors. But it will be nice 9________ in the pictures no matter what may be on the screen. It will be grand to know we have each other’s 10________ . Won’t it be wonderful to be together — really together in the flesh, not just to know that a letter is all we can send. I love you, Chris
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【简答题】金属铸造性能主要包括金属的流动性和收缩。影响收缩的因素有(),浇注温度,铸件条件和铸件结构。
【单选题】金属的铸造性能主要有( )。
A.
流动性和收缩性
B.
流动性和导热性
C.
热膨胀性和收缩性
D.
导热性和热膨胀性
【判断题】启动、加速和满速运行不是电梯电气控制线路的组成部分。( )
A.
正确
B.
错误
【单选题】通过噬菌体为媒介,将供体菌的基因转入受体菌内使之基因改变称为
A.
接合
B.
转化
C.
转导
D.
溶原性转换
【判断题】铸造性能主要有金属的流动性和收缩。
A.
正确
B.
错误
【多选题】金属的铸造性能主要有( )
A.
流动性
B.
收缩性
C.
导热性
D.
热膨胀性
【简答题】金属铸造性能主要包括金属的流动性和收缩。影响收缩的因素有()。
【判断题】机械的效率和损失率的和应该等于1.
A.
正确
B.
错误
【简答题】类和对象的关系可描述为:类是对象的___;对象是类的__。
【单选题】金属()的主要指标有流动性、收缩性和偏析倾向。
A.
锻造性能
B.
铸造性能
C.
焊接性能
D.
切削性能
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