一个圆锥的体积是20立方分米,底面积是15平方分米,它的高是______分米.
20÷13÷15,
=20×3÷15,
=4(分米);
答:它的高是4分米;
故答案为:4.
完成句子(每空1分,共8分)
根据所给提示,完成句子,每空一词,含缩略词。
小题1:Tony did his homework just now. (改为否定句)
Tony ___________ _____________ his homework just now.
小题2:The workers grew many flowers in Chongqing Expo Garden. (改为被动句)
Many flowers _________ ____________ in Chongqing Expo Garden.
小题3:The exchange student often teaches himself Chinese. (改为同义句)
The exchange student often __________ Chinese _________ himself.
小题4:我已经有一个月没有收到她的来信了。(完成译句)
I haven’t _________ ___________ her for one month.
正常人血浆中Na2HPO4/NaH2PO4之比是()。
A.20:1
B.10:1
C.5:1
D.4:1
E.2:1