肾盂的形态多数为()
A.壶腹形
B.圆形
C.枝形
D.喇叭状
E.卵圆形
参考答案:D
用动词填空。
Tomas Edison 1_____ a great inventor. He 2_____ many things. It 3_____ said he invented 10000
inventions. But when he 4_____ old. He was too proud that he didn't 5_____ any one advice, even they
were right. Then he didn't have an important invention in his old age.
把5米长的钢筋,锯成每段一样长的小段,共锯6次,每段占全长的( ),每段长( )米。如果锯成两段需2分钟,锯成6段共需( )分钟。