在窗体上画一个名称为Text1的文本框,然后画三个单选按钮,并用这三个单选按钮建立一个控件数组,名称为Option1,程序运行后,如果单击某个单选按钮,则文本框中的字体将根据所选择的单选按钮切换,请选择空白处合适的语句( )。 Private Sub Option1_Click(Index AS Integer) Select Case______ Case 0 a="宋体" Case 1 a="黑体" Case 2 a="楷体 GB2312" End Select Text1.______=a End Sub
A. Option Text
B. Index Text
C. Index Font
D. Option Font
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根据以下资料。回答下列问题。 据海关统计,浙江省纺织纱线、织物及制品、床垫、寝具及类似品出口额从2004年的11.50亿美元上升到2009年的31.44亿美元,占出口额的比重从11.4%上升到13.7%,上升2.3个百分点。全部国有及年产品销售收入500万元以上的非国有纺织企业(即规模以上纺织企业,下同)出口交货值占销售产值的比重上升。2009年,全省规模以上纺织企业实现出口交货值320.05亿元,占销售产值的30.7%,不仅比2006年提高3.3个百分点,而且比制造业高4.4个百分点。 根据国家统计局工业经济效益评价考核体系测算,2009年,浙江省规模以上纺织企业综合经济效益指数达到132.38,比2004年上升50.55点。 纺织业生产、销售增长速度低于制造业平均水平,但利润、利税增幅明显快于制造业。2004-2009年,浙江省规模以上纺织企业实现工业增加值、产品销售收入年均增幅分别为12.8%和12.9%,比同期制造业平均水平低2.9和2.6个百分点;实现利润、利税额年均增幅分别为118.4%和29.3%,比制造业平均水平高86.6和6个百分点。 2004-2009年浙江省规模以上纺织业综合经济效益指数指标2004年2005年2006年2007年2008年2009年综合经济效益指数81.8389.7298.79109.27123.82132.38总资产贡献率(%)8.178.518.699.3710.9212.09资本保值增值率(%)105.33110.77125.80105.53110.67122.59资产负债率(%)71.0369.8166.3564.9261.5459.43流动资产周转率(次)1.861.982.122.362.752.78成本费用利润率(%)0.761.592.043.564.324.79全员劳动生产率(元)161051891823324284893392237703产品销售率(%)94.6496.0995.3696.9597.2397.03 2009年,制造业实现出口交货值( )亿元。
A. 285.65
B. 133.44
C. 274.18
D. 305.46
Under proper conditions, sound waves will be reflected from a hillside or other such obstruction. Sound travels at the rate of about one-fifth of a mile per second. If the hill is eleven hundred feet away, it takes two seconds for the sound to travel to the hill and back. Thus, by timing the interval between a sound and its reflection (the echo), you can estimate the distance to an obstruction. During World War I1 the British used a practical application of this principle to detect German planes on their way to bomb London before the enemy was near the target. They used radio waves instead of sound waves, since radio waves can penetrate fog and clouds. The outnumbered Royal Air Force (RAF) always seemed to the puzzled Germans to be lying in wait at the right time and never to be surprised (袭击). It was radio echoes more than anything else that won the Battle of Britain. Since the radio waves were used to tell the direction in which to send the RAF planes and distance to send them ( their range of flight, in other words), the device was called radio directing and ranging, and from the initials the word radar was coined. Practical application of this principle resulted in ______.
A. new electronic instruments for planes
B. new radio sets for RAF bombers
C. an electronic detecting device
D. a radio directing and ranging device
原型内化的教学要求之一是活动在言语水平上先______,以后再______。
防火墙是隔离内部网和外部网的一类安全系统。通常防火墙中使用的技术有包过滤和代理两种。路由器可以根据 (35) 进行过滤,以阻拦某些非法访问。 (36) 是一种代理协议,使用该协议的代理服务器是一种 (37) 网关。另外一种代理服务器使用 (38) 技术,它可以把内部网络中的某些私有IP地址隐藏起来。 安全机制是实现安全服务的技术手段,一种安全机制可以提供多种安全服务,而一种安全服务也可采用多种安全机制。加密机制不能提供的安全服务是 (39) 。
A. STT
B. SOCKS
C. HTTP
D. SSL