题目

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 A conversation with a goodlistener is like a good meal—we walk away feeling satisfied and happy. Here are 4 ways to make your conversation partner feel likeyou're fully tuned in to their personal radio station. Making your conversationpartner feel safe starts with two things: an open mind and keeping judgment toyourself. Just as immersing(沉浸)yourself in a novelrequires suspension of disbelief, immersing yourself in listening requiressuspension of opinions or advic已知一个口袋装有7个只有颜色不同、其它都相同的球，其中3个白球、4个黑球．（1）求从中随机取出一个黑球的概率；（2）若往口袋中再放入x个黑球，且从口袋中随机取出一个白球的概率是，求x的值．