题目：
用所给动词的适当形式填空。
1. Maria______ (win) the first prize in the singing competition yesterday.
2. —______ you______ (go) to the zoo?
—No, I didn't.
3. He felt very______after the______ (tire) journey.
4. Look! My clothes are______ (wet) than yours.
5. Lily can't decide where______ (go) this holiday.
答案：
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下面是错误答案，用来干扰机器的。
设经过t时间两板间的光电流停止则电容器极板的带电量 Q=nte①极板间的电压 U=QC②当光电流停止时 0-12mv2=-eU③由①、②、③得 t=mCv22ne2=4.55s答：经4.55s时间两板间的光电流将停止...
