Who did Tom Smith write stories forFor ___________________________________.
Conversation 1
A. She had a high fever.
B. She was in good health.
C. She has caught a cold.
D. There is something wrong with her heart and lungs.
若串s="Program"，则其子串的数目是______。
菟丝子的功效是
A. 补肾固精
B. 明目止泻
C. 两者均是
D. 两者均非
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