搜题请搜索小程序“爱下问搜题”
问题 单项选择题

跨河水准测量时，跨河两岸测点间的水平视线距水面应有一定的高度并应大致相等，可以克服或减弱（）。

A.i角误差

B.大气垂直折光影响

C.φ角误差

D.两水准标尺的零点差

答案

参考答案：B

填空题
从b栏中找出与a栏中相对应的答语。
a
b
Can I help you?
B. The same to you.
When is his birthday?
C. I don’t know.
Happy New Year!
D. No, I can’t.
Do you have a tennis racket?
E. No, I don’t.
Can you play chess?
F. That sounds great.
Are these your parents?
G. It’s fifteen dollars.
Does Gina like comedies?
H. History.
How much is the blue sweater?
I. May, 5th.
What is your favorite subject?
J. No, they are my uncle and aunt.
Let’s play soccer ball.
A. Yes, please.
查看答案
单项选择题

如果发行的证券化产品属于债券，发行前必须经过（）进行信用评级。

A.承销人

B.投资人

C.信用增级机构

D.信用评级机构
查看答案