题目

如图，半圆直径为10厘米，π取3.14，按要求计算。 （1） 计算组合图形的周长。 （2） 计算阴影部分的面积。 答案：解：10+10+3.14×10×14 =20+7.85 =27.85（厘米） 答：组合图形的周长是27.85厘米。 解：10÷2=5（厘米） 5×5÷2=12.5（平方厘米） 答：阴影部分的面积是12.5平方厘米。 阅读下面短文，从短文后所给各题的四个选项（A、B、C、D）中，选出可以填入空白处的最佳选项。 　　On May 27,1995,our life was suddenly changed．It happened a few minutes past three．　　1　　 my husband,Chris,fell from his horse as it 　　2　　 over a fence．Chris was paralyzed（瘫痪）from the chest down,　　3　　 to breathe normally．As he was thrown from his horse,we entered into a life of 　　4　　 with lots of unexpected challenges（挑战）．We went from the “haves”to the“have-nots”．Or so we thought． 　　　　5　　 what we discovered later were all the gifts that came out of 　　6　　 difficulties．We came to learn that something 　　7　　 could happen in a disaster All over the world people 　　8　　 Chris so much that letters and postcards poured in every day．By the end of the third week in a 　　9　　 center in Virginia,about 35 000 pieces of 　　10　　 had been received and sorted． 　　As 　　11　　,we opened letter after letter．They gave us 　　12　　 and became a source of strength for us．We used them to 　　13　　 ourselves．I would go to the pile of letters marked with “Funny”if we needed a 　　14　　,or to the“Disabled”box to find advice from people in wheelchairs or 　　15　　 in bed living happily and 　　16　　． 　　These letters,we realized,had to be shared．And so 　　17　　 we offer one of them to you． 　　Dear Chris． 　　My husband and I were so sorry to hear of your 　　18　　 accident last week．No doubt your family and your friends are giving you the strength to face this 　　19　　 challenge．People everywhere are also giving you best wishes every day and we are among those who are keeping you 　　20　　． Yours Sincerely． (1) [　　] A． since B． before C． when D． while (2) [　　] A． walked B． climbed C． pulled D． jumped (3) [　　] A． able B． unable C． suitable D． unsuitable (4) [　　] A． disability B． possession C． convenience D． experience (5) [　　] A． So B． For C． Or D． Yet (6) [　　] A． sharing B． separating C． fearing D． exploiting (7) [　　] A． terrible B． similar C． wonderful D． practical (8) [　　] A． wrote for B． cared for C． hoped for D． sent for (9) [　　] A． medical B． postal C． experimental D． mental (10) [　　] A． news B． paper C． equipment D． mail (11) [　　] A． patients B． a family C． nurses D． a group (12) [　　] A． effect B． effort C． comfort D． explanation (13) [　　] A． encourage B． express C． control D． treat (14) [　　] A． cry B． laugh C． chat D． sigh (15) [　　] A． much B． never C． even D． seldom (16) [　　] A． bitterly B． fairly C． weakly D． successfully (17) [　　] A． here B． there C． therefore D． forward (18) [　　] A． driving B． flying C． running D． riding (19) [　　] A． technical B． different C． difficult D． valuable (20) [　　] A． nearby B． close C． busy D． alive