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第二节(共 10 小题;每小题 1.5 分,满分 15 分) 阅读下面短文,在空白处填入 1 个适当的单词或括号内单词的正确形式。 Summer is over, but there's no reason to be upset as that means autumn is upon us, arguably the 61 (good) season of the year. Beijing's autumn is extremely short, so parks around the city fill up fast with people coming to see the season's sight 一 a show of changing 62 (color) as the trees turn from dark green to deep red. There are plenty of places in the city center 63 (catch) the golden Gingko leaves, but I'm heading just outside of the Fifth Ring Road to see the season on 64 larger scale. Despite parks like Xiangshan getting so busy _ 65 you need tickets a week in advance, there are still areas well-known and 66 _ (frequent) visited by the Beijing crowds, and Baiwangshan, one of such places, 67 (locate) 3km from the Summer Palace to the city's North West. It offers hiking tails and beautiful views of the city and 68 (surround) forests. 1 love coming to Beijing's parks at this time of year because I can always enjoy 69 (I), bathing in the last of the good weather and golden colors. You never know 70 you’re going to find around every corner.
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【单选题】正弦电压υ的幅值为10V，其波形如图所示，施加于容抗Xc=5υ的电容元件上，通过该元件上的电流ic与u取关联正方向，则电流ic=( )。
A.
50sin(ωt-90°)A
B.
2sin(ωt+120°)A
C.
50sin(ωt+90°)A
D.
2sin(ωt-120°)A
【单选题】正弦电压 u 的 幅值为 10 V , 其波形如图所示 , 施加于容抗 X C = 5 W 的电容元件上 , 通过该元件的电流 i C 与 u 取关联正方向,则 电流 i C = ( ) 。
A.
2 sin( w t － 60 ° ) A
B.
2 sin( w t +120 ° ) A
C.
50 sin( w t － 120 ° ) A
【单选题】正弦电压u的幅值为10V,其波形如图所示,施加于容抗Xc=5Ω的电容元件上,则电流ic = ( )。
A.
50sin(wt-90°)A
B.
2sin(wt+120°)A
C.
50sin(wt+90°)A
D.
2sin(wt-60°)A
【简答题】向来被视为是尊贵、典雅、稍微带点高不可攀味道的香槟，现在被喜欢追逐时尚的年轻人创造出了新喝法，你知道“香槟另类时尚新喝法”是什么样的吗？
【简答题】四个人独立的破译一份密码,已知各人能译出的概率分别为 ,则密码能被译出的概率是 。
【单选题】正弦电压u的幅值为10V，其波形如图10-24所示，施加于容抗XC=5Ω的电容元件上，通过该元件的电流iC与u取关联正方向，则电流iC=（）A。
A.
50sin（ωt-90°）
B.
2sin（ωt+120°）
C.
50sin（ωt+90°）
D.
2sin（ωt-120°）
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