【题目】Scientists are convinced _______ the positive effect of laughter _______ physical and mental health.
A.in; onB.of; onC.on; atD.in; at
在线课程【答案】B
【解析】
考查介词。句意：科学家们确信笑对身心健康有积极的影响。be convinced of是固定句式，意为“相信……”；effect经常和on搭配，表示“对……的影响”。故选B。
查询谷 - www.chaxungu.com
最新文章
- 2026-04-27Scientists are convinced the positive effect of laughter physical and mental health.A.in; onB.of; on
- 2026-04-27Children often do as well as what adults, particularly parents and teachers, of them.A.supposeB.supp
- 2026-04-27Believe it or not, I met a s football star this morning on the street.
- 2026-04-27We didn’t have the proper equipment, but we somehow and finished the work on time.A.demandedB.repres
- 2026-04-27Its products are not only popular in China but also e to other countries.
- 2026-04-27I like teaching because it is an o to my taste.
- 2026-04-27What does the woman ask the man to do?A.Lend a book to her.B.Return a book for her.C.Go to the libra
- 2026-04-27What is the woman probably doing?A.Asking for permission.B.Ordering a dish.C.Making a complaint.