已知向量a=(1,-2),b=(4,2),那么a与b夹角的大小是 ______.

题型:填空题

问题:

已知向量
a
=(1,-2),
b
=( 4,2),那么
a
b
夹角的大小是 ______.
考点:用数量积表示两个向量的夹角
题型:填空题

连词成句。

1. your , move , please , knee(.)

                          _________________________________

2. mouth , open , please , your(.)

                          _________________________________

3. my , hurt , arm(.)

                            ________________________________

4. have , you , stay , home , to , at(.)

                            ________________________________

5. you , head , can , your , lower(?)

                              _______________________________

6. will , lessons , help , I , you , English , with , your(.)

                              _______________________________

7. cherries , you , here , for , some , are(.)

                                ______________________________

8. is , lamb , where , the(?)

                                    ____________________________

9. calf , there , nearby , a , is(.)

                                ______________________________

10. that , a , cub , lion , is(?)

                                  _____________________________

题型:填空题

评标委员会提出书面评标报告后,招标人一般应当在( )日内确定中标人。

A.10

B.15

C.20

D.25

题型:填空题

( )是指国有资产监督管理机构依据国家清产核资政策和有关财务会计制度规定,对企业申报的各项资产损益和资金挂账进行认证。

A.账务清理

B.损益认定

C.清产核资

D.资产评估

题型:填空题

—All the students in Class One went to the cinema ________ Li Ping. Why?

—Because he had a stomachache. [ ]

A. besides

B. without

C. except

D. beside

题型:填空题

请从空间维度简述经济法的适用范围。

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