【单选题】The taller the tree is to grow, _______.
A.
the greater the value is
C.
the greater is the value
【单选题】Why should pruning be done?
A.
To make the tree grow taller.
B.
To improve the shape of the tree.
C.
To get rid of the small branches.
D.
To make the small branches thicker.
【单选题】The taller the tree is to grow,_____.( )
C.
the greater the value is
D.
the greater is the value
【单选题】The taller the tree is to grow, ___________.
B.
the greater is the value
C.
the greater the value is
【单选题】三相桥式不可控整流电路中,若有一个二极管虚焊断开,一个周期输出的电压变为()脉波。