免疫防龋中,抗体到达釉质表面可能性最大的途径是
A.血清→牙髓→釉质表面
B.血清→唾液→釉质表面
C.血清→龈沟液→釉质表面
D.血清→黏膜表面→釉质表面
E.以上途径机会均等
第1题
If he my advice, he wouldn't have lost his job.
A. followed
B. should follow
C. had followed
D. would follow
第2题
A should
B must
C wouldn’t
D can’t
第3题
He was quite regretted and he __________ wished he the chance.
[A] shouldn't lost
[B] didn't lose
[C] hadn't lost
[D] wouldn't lose
第4题
His father wouldn't give him any money, and ______ lend him any.
A.or he would
B.nor he would
C.nor would he
D.or would he
第5题
A.should
B.must
C.wouldn’t
D.can’t
第6题
He might have lost his daughter ______ the timely arrival of the policemen.
A.but for
B.except for
C.besides
D.except
第7题
He might have lost his daughter ______ the timely arrival of the policemen.
A.but for
B.except for
C.besides
D.except
第8题
A.should
B.must
C.wouldn’t
D.can’t
第9题
He was in poverty at the time, he wouldn’t have accepted the money.()
A. However
B. Therefore
C. Otherwise
D. Then
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