计算:(-21)-(-14)+(-16)+21。

题型:计算题

问题:

计算:(-21)-(-14)+(-16)+21。

考点:有理数的加减混合运算
题型:计算题

一个物体做自由落体运动,取g=10m/s2,则(  )

A.物体3s末的速度为15m/s

B.物体3s末的速度为30m/s

C.物体3s内下落的高度是90m

D.物体3s内下落的高度是30m

题型:计算题

按要求写出两个数,使它们的最大公因数是1.

(1)两个数都是质数:______(3)一个质数一个合数:______

(2)两个数都是合数:______(4)1和任何一个自然数:______.

题型:计算题

客人满意程度是指客人享受旅游企业服务后得到的感受.印象和()。

A.欣慰

B.好情绪

C.评价

D.咒骂

题型:计算题

Rosa and Dimitri are the parents of two children.Their daughter Anna is 17 years old and has asked her parents for permission to marry her boyfriend Alexei. Anna’s ext birthday is in 11 months’ time.Their son Peter is 21 years old. He has had numerous personal problems, including convictions for theft. His various ddictions have also led him to steal from his family, causing considerable financial difficulties for them.Required:

(a) Discuss the legal implications of Rosa and Dimitri’s decision to allow Anna to marry in relation to Anna’s egal capacity. (4 marks)

题型:计算题

交叉性瘫痪病变部位在()。

A.小脑

B.内囊

C.大脑半球

D.脑干

E.脊髓

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