【简答题】E2F1 is a critical transcription factor that participates multiple physiological and pathological processes. Based on the E2F1 activition pathway showed below (or PPT page 33-34), please design an exp...
【单选题】如图,正方形ABCD的边长为2,点E在AB边上.四边形EFGB也为正方形,设△AFC的面积为S,则 [ ]
【单选题】DC Motors are electromechanical devices which use the interaction of magnetic fields and conductors to convert the ( 1) energy into rotary (2) energy.
A.
(1)mechanical (2)electrical
B.
(1)electrical (2)mechanical
C.
(1)electromagnetic (2)mechanical
D.
(1)mechanical (2)electromagnetic
【多选题】油田注水的水源水质必须满足以下( )要求。
【多选题】飞机库的消防水源必须满足()同时供水要求和最大用水量。
【判断题】I. Match the following: 1.what does each view of language stress? 1 ) .Structural view of language a.appropriate use 2 ) .Functional view of language b.system or rules 3 ) . Inte...
【简答题】Discuss the following questions with your partners. 1. What do you think, as a learner, can gain through classroom interaction? 2. How do you understand "there is complex relationship between teacher ...
【单选题】如图,正方形ABCD边长为4cm,以正方形的一边BC为直径在正方形ABCD内作半圆,再过A作半圆的切线,与半圆相切于F点,与DC相交于E点,则△ADE的面积是 [ ]
【简答题】如图,在正方形ABCD中,E是边BC上的一点. (1)若线段BE的长度比正方形ABCD的边长少2cm,且△ABE的面积为4cm 2 ,试求这个正方形ABCD的面积; (2)若正方形ABCD的面积为8cm 2 ,E是边BC上的一个动点,设线段BE的长为xcm,△ABE的面积为ycm 2 ,试求y与x之间的函数关系式和函数的定义域; (3)当x取何值时,第(2)小题中所求函数的函数值为2?