高产田小麦的适宜株高是（）
A.60-70cm
B.80-90cm
C.110-120cm
D.140-150cm
参考答案：B
领导层的本质态度是一种（）的态度。
Before he sank into unconsciousness, he ________ towards the window and managed to open it.
A．fought
B．struggled
C．walked
D．dragged
