【单选题】设置滚动字幕水平空白空间为30px,垂直空白空间为50px的方法正确的是___________。
【单选题】We found _________ necessary _________ our pocket money to support Project Hope.
【简答题】请按课外要求完成每个小组的系统分析说明书,并上传至对应的论坛帖子里。
【简答题】有两个电容器,电容分别为10μF和20μF,它们的额定工作电压分别为25V和15V。现将它们并联后接在10V的直流电源上,则它们储存的电荷量分别是____和____;此时等效电容是____μF;并联电路允许加的最大工作电压是____。(用小数表示)
【单选题】Can you help me to ______ these tickets ? A hand to B hand up C hand over D hand out
【单选题】They sent us their statement, ______ to get our support.
【单选题】He cooks everything___________. A.with hand B.by hand C,by the hand D.with the hand
【单选题】They sent us an open letter, ______ to win our support.