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（2023九上·开学考） 完形填空 Janet is my best friend. One day, however, I nearly ended our friendship. I remember that day clearly. We were 16． in the classroom. The teacher was giving us the results of a maths exam. I had done bad

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（2023九上·开学考）—I visited the purple Mountain Observatory last Sunday. — ____ Why didn't you tell me earlier?

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（2023九上·开学考） Do you know ____?

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（2023九上·开学考） The new term is coming and Eric wants to buy a new pair of sports shoes ____ school.

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（2023九上·开学考） We ____ cross the street when the traffic lights are red.

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（2019九上·惠州期中）Look! Your room is a real mess. You should ________ as soon as possible.

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（2023九上·开学考） With the help of the teachers, the shy girl gets ____. She'd like to talk to others.

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（2015·南宁）We have been friends _________．

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（2023九上·开学考） I'm afraid of dogs. That's____ I don't feed them.

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（2023九上·开学考） My brother is active and he loves some kinds of sports, ____ swimming.

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（2023九上·开学考） Henry and Peter not only play tennis well but also train very hard. We hope ____ of them can join our team.

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（2018·北京）Many people like pandas they are cute.

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（2023九上·开学考） Henry ____ his homework when his hand began to hurt.

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（2023九上·开学考） — ____ do you feel after a long walk? — A bit tired.

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如图,是由$7$个大小相同的小立方体块搭建的几何体,其中每个小正方体的棱长为$1$厘米.请按要求在方格内分别画出从这个几何体的三个不同方向看到的形状图. ​

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如图,$Rt\triangle ABC$中,$\angle ACB=90^{\circ}$,$AC=BC=2\sqrt{2}$,若把$Rt\triangle ABC$绕边$AB$所在直线旋转一周,则所得几何体的表面积为（ ）

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下列说法:①柱体的两个底面一样大；②圆柱、圆锥的底面都是圆；③棱柱的底面是四边形；④长方体一定是柱体；⑤直棱柱的侧面一定是长方形.其中正确的个数是（ ）

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一个小立方块六个面分别标有字母$A$,$B$,$C$,$D$,$E$,$F$,从三个不同方向看到的情形如图所示,则$C$,$D$,$F$对面的字母分别是（ ）

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如图,这是正方体的平面展开图.若将图中的平面展开图折叠成正方体后,相对面上的两个数互为相反数,求$x-y+z$的值.

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若一个七棱柱的一条侧棱长$10cm$,底面的每条边长都是$2cm$,则所有棱长的和为______$cm.$

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