330kV和500kV线路应沿全线架设( ),但少雷区除外。
A.双避雷线; B.单避雷线; C.避雷针; D.避雷串。
参考答案:A
①被蜜蜂蛰过的猴子,不再取食蜂蜜;②失去雏鸟的红雀,饲喂张口求食的金鱼;③母鸡孵卵;④老鼠走迷宫而取到食物.其中属于先天性行为的是( )
A.①④
B.②③
C.②④
D.①③
As a young man, Comrade Zhou Enlai _____ the students movements and later _____ the Communist Party of China.
A.joined; took part in
B.took part in; joined
C.joined in; took part in
D.took part in; joined in