减轻固定桥桥体所受力的方法是错误的是（ ）。
A．减少面颊舌径
B．扩大面舌外展隙
C．加深面颊舌沟
D．增加面副沟
E．脱离接触
参考答案：E
细菌有________、________、_________等不同形态。
The old man asked Lucy to move to another chair ________ he wanted to sit next to his wife.[ ]
A. although
B. unless
C. because
D. if
