设函数f(u)可导，y=f(x2)当自变量x在x=-1处取得增量△x=-0.1时，相应的函数增量△y的线性主部为0.1，则f'(1)=______．
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下列生理活动调节中具有正反馈控制的是
A. 血压的压力感受性反射
B. 胃液分泌的反射性调节
C. 排尿反射
D. 排汗反射
E. 骨骼肌的牵张反射
Which sport is regarded as typically English
A. Basketball
B. Football
Cricket
D. Tennis
The restrictive banking laws of the 1930's are still on the book because______.
A. the bank failures of the 1930's were caused by restrictive courts
B. banking has not changed during the past 50 years
C. legislators believe banking problems similar to those of the Depression still exist today
D. the banking system is too restrictive, but no alternatives have been suggested
不属于按埋设形式划分的地脚螺栓是( )。
A. 固定式地脚螺栓
B. 活动式地脚螺栓
C. 黏结地脚螺栓
D. 预埋地脚螺栓
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