基托具有以下功能使其可以加强义齿的固位和稳定作用,但不包括
A. 进入制锁区
B. 与基牙及邻近牙接触可以形成抵抗义齿位移的力量
C. 与粘膜之间存在唾液,三者间有吸附力
D. 有防止义齿翘动的间接固位作用
E. 进入组织倒凹区
The teacher demanded that ______ should John change his mind.
A. by no means
B. no doubt
C. under no circumstances
D. no way
After his journey from abroad, Richard Jones returned home, ______.
A. exhausting
B. exhausted
C. being exhausted
D. having exhausted
The pilot asked all the passengers on board to remain ______ as the plane was making a landing.
A. seat
B. seating
C. seated
D. to be seating