搜题请搜索小程序“爱下问搜题”
问题 填空题

三棱柱的一个侧面面积为S，此侧面所对的棱与此面的距离为h，则此棱柱的体积为______．

答案

将该斜三棱柱补成一个四棱柱，该四棱柱的底面积为S，高为d，

故四棱柱的体积为Sd，

∴V斜三棱柱=

1
2
dS．

故答案为：

1
2
ds

完形填空

Another time five months ago, I __小题1:____to be upstairs ____小题2:__when the window was open. I didn’t go downstairs until the window had to be _____小题3:_. The dark, the rainy evening, the wind, the __小题4:______clouds held me ____小题5:___in their power.

So why has English changed over time? __小题6:_______all languages change and develop when cultures meet and ____小题7:_with each other. At first the English ____小题8:_in England between about AD 450 and 1150 was very different from the English spoken today. It was ___小题9:___more on German than the English we speak ___小题10:______.
查看答案
单项选择题

关于卧床对机体代谢和内分泌的影响，下列叙述不正确的是

A．雄激素水平降低

B．肾上腺皮质激素分泌增加

C．抗利尿激素分泌增加

D．血清钙离子增加

E．甲状旁腺素增加
查看答案