正手

<p style="Z-INDEX: 105; LINE-HEIGHT: 143px; WIDTH: 143px; HEIGHT: 143px; TOP: 8886px; LEFT: 1736px" class="reader-word-layer reader-word-s3-2">、</p>
<p style="Z-INDEX: 106; LINE-HEIGHT: 143px; WIDTH: 2159px; HEIGHT: 143px; TOP: 8886px; LEFT: 1859px" class="reader-word-layer reader-word-s3-7">四分之一定律开始练习正手攻球，</p>
<p style="Z-INDEX: 107; LINE-HEIGHT: 143px; WIDTH: 575px; HEIGHT: 143px; TOP: 8886px; LEFT: 3998px" class="reader-word-layer reader-word-s3-3">要牢记个</p>
<p style="Z-INDEX: 108; LINE-HEIGHT: 143px; WIDTH: 215px; HEIGHT: 143px; TOP: 8886px; LEFT: 4573px" class="reader-word-layer reader-word-s3-0">1/4</p>
<p style="Z-INDEX: 109; LINE-HEIGHT: 143px; WIDTH: 143px; HEIGHT: 143px; TOP: 8886px; LEFT: 4789px" class="reader-word-layer reader-word-s3-2">，</p>
<p style="Z-INDEX: 110; LINE-HEIGHT: 143px; WIDTH: 441px; LETTER-SPACING: 5px; HEIGHT: 143px; TOP: 8886px; LEFT: 4912px" class="reader-word-layer reader-word-s3-2">一是，</p>
<p style="Z-INDEX: 111; LINE-HEIGHT: 143px; WIDTH: 1151px; HEIGHT: 143px; TOP: 8886px; LEFT: 5333px" class="reader-word-layer reader-word-s3-9">手臂挥拍的轨迹是</p>
<p style="Z-INDEX: 112; LINE-HEIGHT: 143px; WIDTH: 215px; HEIGHT: 143px; TOP: 8886px; LEFT: 6485px" class="reader-word-layer reader-word-s3-0">1/4</p>
<p style="Z-INDEX: 113; LINE-HEIGHT: 143px; WIDTH: 287px; HEIGHT: 143px; TOP: 8886px; LEFT: 6701px" class="reader-word-layer reader-word-s3-5">园，</p>
<p style="Z-INDEX: 114; LINE-HEIGHT: 143px; WIDTH: 1296px; HEIGHT: 143px; TOP: 9143px; LEFT: 1233px" class="reader-word-layer reader-word-s3-5">球拍摩擦球也是球的</p>
<p style="Z-INDEX: 115; LINE-HEIGHT: 143px; WIDTH: 215px; HEIGHT: 143px; TOP: 9143px; LEFT: 2528px" class="reader-word-layer reader-word-s3-0">1/4</p>
<p style="Z-INDEX: 116; LINE-HEIGHT: 143px; WIDTH: 143px; HEIGHT: 143px; TOP: 9143px; LEFT: 2744px" class="reader-word-layer reader-word-s3-2">，</p>
<p style="Z-INDEX: 117; LINE-HEIGHT: 143px; WIDTH: 2446px; LETTER-SPACING: 0px; HEIGHT: 143px; TOP: 9143px; LEFT: 2826px" class="reader-word-layer reader-word-s3-2">手臂挥拍放松至起始位置也是按原先的</p>
<p style="Z-INDEX: 118; LINE-HEIGHT: 143px; WIDTH: 215px; HEIGHT: 143px; TOP: 9143px; LEFT: 5272px" class="reader-word-layer reader-word-s3-0">1/4</p>
<p style="Z-INDEX: 119; LINE-HEIGHT: 143px; WIDTH: 1440px; HEIGHT: 143px; TOP: 9143px; LEFT: 5488px" class="reader-word-layer reader-word-s3-5">圆弧－－陆教练在球案</p>
<p style="Z-INDEX: 120; LINE-HEIGHT: 143px; WIDTH: 1152px; HEIGHT: 143px; TOP: 9400px; LEFT: 1233px" class="reader-word-layer reader-word-s3-5">上以端线为直径，</p>
<p style="Z-INDEX: 121; LINE-HEIGHT: 143px; WIDTH: 1728px; HEIGHT: 143px; TOP: 9400px; LEFT: 2364px" class="reader-word-layer reader-word-s3-5">中线与端线的交点为圆心，</p>
<p style="Z-INDEX: 122; LINE-HEIGHT: 143px; WIDTH: 719px; HEIGHT: 143px; TOP: 9400px; LEFT: 4072px" class="reader-word-layer reader-word-s3-5">划一园弧，</p>
<p style="Z-INDEX: 123; LINE-HEIGHT: 143px; WIDTH: 2160px; HEIGHT: 143px; TOP: 9400px; LEFT: 4772px" class="reader-word-layer reader-word-s3-5">右半边的弧线就是手臂挥拍的下投</p>
<p style="Z-INDEX: 124; LINE-HEIGHT: 143px; WIDTH: 4321px; HEIGHT: 143px; TOP: 9656px; LEFT: 1233px" class="reader-word-layer reader-word-s3-5">影；然后面对墙，以自己的身高，作攻球的准备动作，以腰部高度划</p>
<p style="Z-INDEX: 125; LINE-HEIGHT: 143px; WIDTH: 71px; HEIGHT: 143px; TOP: 9656px; LEFT: 5549px" class="reader-word-layer reader-word-s3-0">1</p>
<p style="Z-INDEX: 126; LINE-HEIGHT: 143px; WIDTH: 1296px; HEIGHT: 143px; TOP: 9656px; LEFT: 5621px" class="reader-word-layer reader-word-s3-5">横线，眉毛高度为最</p>
<p style="Z-INDEX: 127; LINE-HEIGHT: 143px; WIDTH: 5761px; HEIGHT: 143px; TOP: 9913px; LEFT: 1233px" class="reader-word-layer reader-word-s3-5">高点，划一圆弧，这是前面的投影。正手攻球，执拍右手拇指压拍，食指放松，中指顶拍，</p>
<p style="Z-INDEX: 128; LINE-HEIGHT: 143px; WIDTH: 287px; HEIGHT: 143px; TOP: 10170px; LEFT: 1233px" class="reader-word-layer reader-word-s3-5">在划</p>
<p style="Z-INDEX: 129; LINE-HEIGHT: 143px; WIDTH: 215px; HEIGHT: 143px; TOP: 10170px; LEFT: 1521px" class="reader-word-layer reader-word-s3-0">1/4</p>
<p style="Z-INDEX: 130; LINE-HEIGHT: 143px; WIDTH: 1728px; HEIGHT: 143px; TOP: 10170px; LEFT: 1736px" class="reader-word-layer reader-word-s3-5">圆弧过程中，拇指和中指有</p>
<p style="Z-INDEX: 131; LINE-HEIGHT: 143px; WIDTH: 215px; HEIGHT: 143px; TOP: 10170px; LEFT: 3463px" class="reader-word-layer reader-word-s3-0">1/4</p>
<p style="Z-INDEX: 132; LINE-HEIGHT: 143px; WIDTH: 1728px; HEIGHT: 143px; TOP: 10170px; LEFT: 3679px" class="reader-word-layer reader-word-s3-5">圆弧的微调动作，击球上部</p>
<p style="Z-INDEX: 133; LINE-HEIGHT: 143px; WIDTH: 215px; HEIGHT: 143px; TOP: 10170px; LEFT: 5405px" class="reader-word-layer reader-word-s3-0">1/4</p>
<p style="Z-INDEX: 134; LINE-HEIGHT: 143px; WIDTH: 1296px; HEIGHT: 143px; TOP: 10170px; LEFT: 5621px" class="reader-word-layer reader-word-s3-5">圆弧；同时前臂也要</p>
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<div style="BACKGROUND-IMAGE: url(http://bcs.wenku.bdimg.com/docconvert3010-nj/%2Fwk%2Fe0a2866529b83cf09a0a53a8cce89f95%2F0.png?sign=MBOT:y1jXjmMD4FchJHFHIGN4z:jApJvfpLngBJ9cF20mHxZ8yXATA%3D&time=1382360482&range=828-&response-cache-control=max-age=2592000&response-expires=Wed%2C%2020%20Nov%202013%2020%3A01%3A22%20%2B0800); Z-INDEX: 1; POSITION: absolute; WIDTH: 893px; HEIGHT: 1263px; OVERFLOW: hidden; TOP: -56px; LEFT: -40px; opacity: 1; -ms-transform: scale(0.91)" class="reader-pic-item"></div></div></div>
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<p style="Z-INDEX: 2; LINE-HEIGHT: 143px; WIDTH: 143px; HEIGHT: 143px; TOP: 1078px; LEFT: 1233px" class="reader-word-layer reader-word-s4-1">有</p>
<p style="Z-INDEX: 3; LINE-HEIGHT: 143px; WIDTH: 215px; HEIGHT: 143px; TOP: 1078px; LEFT: 1377px" class="reader-word-layer reader-word-s4-3">1/4</p>
<p style="Z-INDEX: 4; LINE-HEIGHT: 143px; WIDTH: 863px; HEIGHT: 143px; TOP: 1078px; LEFT: 1593px" class="reader-word-layer reader-word-s4-4">圆弧的旋转。</p></div></div>

正手攻球1/4是关键