/*习题1格式*/
	i {	display: none;
		color: red;}
	
	ul li {	font-size: 16px;padding-left: 20px;	padding-right: 30px;
		list-style: none;line-height: 22px;	float: left;}
	
	span {color: #0d41fc;	}
	
	p {	font-size: 16px;padding-left: 10px;	padding-top: 10px;
		cursor: pointer;line-height: 18px;	clear: left;}
	ol{
		font-size: 16px;padding-left: 60px;	line-height: 10px;
	}
	
	img{ padding-left: 30px;}