题目内容
| Scientists are convinced _____ the positive effect of laughter _____ physical and mental health. |
A. of; at B. by; in C. of; on D. on; at |
试题答案
CScientists are convinced the positive effect of laughter physical and mental health.
A.of; at B.by; in C.of; on D.on;at
查看习题详情和答案>>Scientists are convinced ___ the positive effect of laughter ___ physical and mental health.
A. of; at B. by; in C. of; on D. on; at
查看习题详情和答案>>Scientists are convinced_____the positive effect of laughter_____physical and mental health.
A.of; at B.by; in C.of; on D.on;at
查看习题详情和答案>>Scientists are convinced ___ the positive effect of laughter ___ physical and mental health.
A.of;at B.by;in
C.of;on D.on;at
查看习题详情和答案>>Scientists are convinced the positive effect of laughter physical and mental health.
A. of; at B. by; in C. of; on D. on; at
查看习题详情和答案>>Scientists are convinced the positive effect of laughter physical and mental health.
A. of; at B. by; in C. of; on D. on; at
查看习题详情和答案>>
Scientists are convinced. _______ the positive effect of laughter _______ physical and mental health.
A. of; at B. by; in C. of; on D. on; at
查看习题详情和答案>>Scientists are convinced ________ the positive effect of laughter ________ physical and mental health.
A. of; at B. on; at C. by; in D. of; on
查看习题详情和答案>>