答案:C
New technologies have made __________easier to enjoy life than ever before.
A.that
B.this
C.one
D.it
放置克令吊吊臂前,应先将吊臂转到支架上方,再把旋转手柄放在()
A.旋转位置;
B.“零位”空挡位置;
C.刹车位置;
D.松开位置。