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【单选题】
早期的硬件乘法器设计中，通常采用“加”和“移位”相结合，具体算法是( )，但需要有( )控制。A.
串行加法和串行移位 触发器
B.
并行加法和串行左移 节拍计数器
C.
并行加法和串行右移 节拍计数器
D.
串行加法和串行右移 触发器
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【简答题】A biome is a major biotic community characterized by the dominant forms of plant life and the prevailing climate. It is a major ecological community, extending over a large area and usually characteri...
【单选题】The Great Plains are a broad expanse of grassland.
A.
extension
B.
very large area
C.
big gap
D.
spending of money
【简答题】相对弯曲半径 R/t 越小,则弯曲时回弹()。A. 越小 B. 越大 C. 没有影响 D. 可以忽略
【单选题】All of the following statements are true of the northern Great Plains EXCEPT
A.
Summer temperatures are very hot, while winter temperatures are very cold
B.
An unbroken prairie now extends from the western mountains to the eastern forest
C.
The original vegetation consisted of shortgrass, mixed grass, and tallgrass
D.
A large number of small wetlands are found throughout the region
【多选题】减小弯曲件回弹的措施（）。
A.
改进弯曲件的设计，避免使用过大的弯曲相对半径r/t
B.
采用校正弯曲代替自由弯曲
C.
对冷作硬化的材料须先退火，使其屈服点降低，必要时采用加热弯曲
D.
合理设计弯曲模
【单选题】Plains are large areas of ______.
A.
high mountains
B.
flat land
C.
thick woods
D.
water
【简答题】_______ are used in plains where rainfall is less and climate is moderate. ______ are preferred wherever rainfall is more. _____ are used to cover large column free areas required for auditoriums, fac...
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