输送机必须在停车时才能推移,以防卡链。()
参考答案:错
(2013·北京高考)If we ________ a table earlier, we wouldn't be standing here in a queue.
A.have booked
B.booked
C.book
D.had booked
治疗便秘时摩腹的方向是()
A.逆时针
B.以逆时针为主
C.顺时针
D.以顺时针为主
E.顺逆各半