2022-2021年中考一?？荚嚁?shù)學(xué)試卷(含答案)

3）78．．．．）．1.10344．1.10341041.1034105）115772．4424lh）ll．l．）成績(jī)（)1.501.65人數(shù)））．．EElBEF）30110．，5670E是BG2BE）5．3851Mx，y1Nx1MNa）213644x2＝．ACB90．．2）2yyx．的AP．413a1a32）a2某校九年級(jí)若干男生坐位體前屈的成績(jī)統(tǒng)計(jì)表成績(jī)（厘米）≥17.8等級(jí)優(yōu)秀人數(shù)a良好及格不及格cDD作DEAEDADEAC．，F(xiàn)是BDAFBAFEDC．yxOAB，CDMAB．ADAM．⌒⌒⌒AB接DE．，7AMMF17，ADFya1a2aayxa22ABCD點(diǎn)E為ADADABEABE∽DEG．．點(diǎn)EDG2CEFDHDH3）．7780．．8）．1.10344．1.10341041.1034105nann有5．110341.1034104．）1152．4422a0a（aa2；a0a；15．424lh）ll．l．hsin．，hll）4x84.5x．，成績(jī)（)人數(shù)C））AECE．．DMCECNAECEAMAEBN∴．EElBEF）30110．，56707040FEGBEG218011218012180；CC．BG2BE）．55x；GEx5x，；x在∵HBAEtanH，5x52525x，∴∴∵525x52x53xDFtanH5253x51xDH51x3x，∴故A．yax2ax2a2，1a）2113a321，30a．644x2＝．xACB90．A50．）32yyx．y的P，QO≌POPB2816，∽∴，OD3BD33，∴由，∽，設(shè)BD2332x32x∴31412）a24a2）a241）a241418某校九年級(jí)若干男生坐位體前屈的成績(jī)統(tǒng)計(jì)表成績(jī)（厘米）≥17.8等級(jí)優(yōu)秀人數(shù)a良好及格不及格c60DD作DEAEDADEAC．B50C28，F(xiàn)是BDAFBAFEDC．∵∴AD∴ADE90AED90DAE902268FBDBAFDAFAFBD，，∴，，∴∴，xyxyyx200x250y∵在x9yyy25y．⌒⌒⌒AECDF交，接．EDFE與⌒⌒⌒⌒AB=，∴⌒⌒∴CAMFAMAMC≌AMF）ABCD，∴∴∴CAFCEDFEAMMF17MFEDFE由，117124222y1a2aayxa22112y2x1x2x1125y，a221故2124a4y過(guò)，y22a2xy22aayx22aa211aa；211a22221122ABCD點(diǎn)E為ADADABEABE∽DEG．．點(diǎn)EDG2CEFDHDH1234180BEG2390，，90ABE90DEG∴ABEDEGAD90ABE∽DEG設(shè)AEABE∽DEx5x12x∴（x332125xDG；2設(shè)AERt22x41，2x22242EGDEDG422233EG4311DEDGEGDM，22EDG33、有勇氣承擔(dān)命運(yùn)這才是英雄好漢。