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第二节 根据中文,完成句子(每空0.5分,共10分) 86.只有持续锻炼一个月后你才能完全康复。 Only after you keep on practising for a month_____  _______completely recover. 87.这幅漂亮的图画吸引了我的注意力。 The beautiful picture _________  ________  _________. 88.我们提前完成了任务,希望得到领导的表扬。 We finished the task ahead of time, ________  ________  ________  _______being praised by the leader. 89.我们到达了一个看起来像超市的地方。 We reached _______  ________  _______ a super market. 90.他母亲死于车祸,使得他的家境更加艰难。 His mother died in a traffic accident , ________ the family even _________  ________. 91.他因谋杀被处死。 He was _______  ________  ________for murder. 92.他花了30 年才建立自己的公司。 He spent 30 years _________  ________ his own company.
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【简答题】因为42+x=77,所以x=77+42.______.
【简答题】3. They ____ in my math class.
【简答题】90°-46°27′=______,180°-42°35′29″=______.
【简答题】某种纸张的厚度为0.00873 cm,用科学记数法表示为(    )cm。
【简答题】根据估算填. 81×30≈______×______=______; 42×29≈______×______=______.
【单选题】My students are all quiet.Even after class, my students spend  ___as they can playing outside.
A.
as little time
B.
little time
C.
less time
D.
time as little
【单选题】下列判断错误的是()
A.
阶梯型矩阵全为零的行在最下方
B.
阶梯型矩阵中,每行的第一个非零元前面的零元素的个数,随着行数的增加而增加
C.
阶梯型矩阵的秩等于非零行的行数
D.
若A为 矩阵,则,r(A)=m或者r(A)=n
【简答题】阅读理解。 What do you usually do after class? When class is over, most students in my class I go out to relax. We have a twenty-minute break (休息) between classes. Look! Some students are in the playground...
【单选题】在回归模型中,下列哪一项在权衡欠拟合(under-fitting)和过拟合(over-fitting)中影响最大?
A.
多项式阶数
B.
更新权重 w 时,使用的是矩阵求逆还是梯度下降
C.
使用常数项
【简答题】先估一估,再用竖式计算(加▲要验算). 38×42≈ 63×57≈ 80×29≈ 38×42= ▲63×57= 80×29=
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