sin15º·sin30º·sin75º的值等于___________.
题目分析:给角求值问题,需注意角之间倍角或互余关系.
选择正确的译文。
1. 这是我的爸爸,他又高又强壮。[ ]
A. This is my dad. He's tall and strong.
B. This is my mom. She's tall and strong.
C. This is my father. He's short and thin.
2. 来认识一下我的家人吧![ ]
A. Come and look at my parents!
B. Come and meet my family!
C. Come and see my family!
在目标管理的过程中,职工的工作目标是由( )确定的。
A.上级 B.职工自行C.上级与职工协商 D.咨询机构