皮皮学，免费搜题
登录
搜题
【单选题】
指要求受访者回答有没有做过，或是否准备做某事以及是否拥有某物的问题是A.
事实性问题
B.
行为性问题
C.
动机性问题
D.
态度性问题
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】We generally take the convention of safety of life at sea adopted in 1974 as a completely new convention, the reason is _____.
A.
it included the amendments agreed up until that date
B.
it included none of the amendments agreed up until that date
C.
it required two thirds of the Parties’ acceptance for a amendment to enter into force
D.
it included a tacit acceptance procedure
【简答题】证明折射光束的方向是等光程方向．即证明图1-14中 L(A 1 B 1 D 1 )=L(A 2 B 2 D 2 )．
【简答题】如图，已知∠１＝∠２，∠A=∠D,证明：∠E=∠C
【简答题】证明 若Dξ=0，则{x=Eξ}=1．
参考解析：
知识点：
题目纠错 0
发布
