当你想向别人寻求帮助时,应说can you help me?还是who can help me?

当你想向别人寻求帮助时,应说can you help me?还是who can help me? 当你向别人寻求帮助时,应说 A can i help you B excuse me C could you help Who can help me? who can help me who can help me, Who can help me! i can help you .but ,who can help me HELP ME WHO CAN HELP ME? Who's help me?Can you? who can help me thank you CAN YOU HELP ME can you help me?