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【单选题】
A main advantage of specialization results from:A.
Economies of large-scale production
B.
The specializing country behaving as a monopoly
C.
Smaller production runs resulting in lower unit costs
D.
High wages paid to foreign workers
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【简答题】小鸡是由鸡蛋中胚盘发育来的，那么胚盘位于：____。
【单选题】What CAN'T you conclude from the passage?
A.
Miss Jarvis was devoted to her mother.
B.
Miss Jarvis knew many important persons.
C.
Miss Jarvis was very persistent.
D.
Miss Jarvis's efforts were not in vain.
【单选题】Miss Gorgers asked this question because she wanted to know whether.
A.
it was easy to phone to Los Angeles
B.
her student could hear her from 75 feet away
C.
her students had grasped(理解 ) her lessone
D.
sound waves were slower than electricity
【简答题】给出下列命题： ①函数f（x）=sinx+|sinx|（x∈R）的最小正周期是2π； ②已知函数 f(x)= acosx，x≥0 x 2 -1，x＜0 在x=0处连续，则a=-1； ③函数y=f（x）与y=1-f -1 （1-x）的图象关于直线x+y+1=0对称； ④将函数 y=tan(ωx+ π 4 )(ω＞0) 的图象按向量 a =( π 6 ，0) 平移后，与函数 y=tan(ωx+ π 6...
【简答题】在计算任何结构时都应该满足哪些条件?
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