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【简答题】
什么是 应力? 什么是应变 ? 2 、 缩颈是如何产生的 ?缩颈发生在拉伸曲线上哪个线段?如果没有出现缩颈现象,是否表示该试样没发生塑性变形? 3、 硬度法和硬度法各有什么优缺点 ?下列材料或者零件通常采用哪种方法检查其硬度
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皮皮学刷刷变学霸
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【简答题】中岛货架间的通道不一定要很宽,但决不能很窄,最好不能低于( ) 。
【单选题】下图描述了一种设计模式，该设计模式不可以(43)。
A.
动态决定由一组对象中某个对象处理该请求
B.
动态指定处理一个请求的对象集合，并高效率地处理一个请求
C.
使多个对象都有机会处理请求，避免请求的发送者和接收者间的耦合关系
D.
将对象连成一条链，并沿着该链传递请求
【多选题】与磺胺药抗菌作用机制有关的描述正确的是（ ）。
A.
结构与PABA相似
B.
与PABA竞争二氢叶酸合成酶，干扰叶酸代谢
C.
与PABA竞争二氢叶酸还原酶，干扰叶酸代谢
D.
不影响人与哺乳动物叶酸的合成
E.
抑制核酸代谢而起到杀菌作用
【单选题】When my husband came here he was very disturbed. And I think he's been encouraged to believe his fantasies really existed. But that's over now, he's ____ himself.
A.
washed
B.
cleansed
C.
purified
D.
purged
【单选题】The market for diamond rings is closely linked to the market for high-quality diamonds. If a large quantity of high-quality diamonds enters the market, then
A.
the supply curve for diamond rings will shift right, which will create a shortage at the current price. That will increase price, which will decrease quantity demanded and increase quantity supplied. The new market equilibrium will be at a higher price and higher quantity.
B.
the supply curve for diamond rings will shift right, which will create a surplus at the current price. That will decrease price, which will increase quantity demanded and decrease quantity supplied. The new market equilibrium will be at a lower price and higher quantity.
C.
the demand curve for diamond rings will shift right, which will create a shortage at the current price. That will increase price, which will decrease quantity demanded and increase quantity supplied. The new market equilibrium will be at a higher price and higher quantity.
D.
the demand curve for diamond rings will shift right, which will create a surplus at the current price. That will decrease price, which will increase quantity demanded and decrease quantity supplieThe new market equilibrium will be at a lower price and higher quantity.
【单选题】如图4-7所示描述了一种设计模式，该设计模式不可以(49)。
A.
将对象连成一条链，并沿着该链传递请求
B.
动态决定由一组对象中某个对象处理该请求
C.
使多个对象都有机会处理请求，避免请求的发送者和接收者间的耦合关系
D.
动态指定处理一个请求的对象集合，并高效率地处理一个请求
【简答题】听对话，回答问题 1. What will the girl buy for her father? A. B. C. 2. What’s the weather like tomorrow? A. B. C. 3. How will Sally go to Xiamen? A. B. C. 4. What was Millie doing last night? A. B. C. 5. Whic...
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