搜题请搜索小程序“爱下问搜题”
问题 判断题

献血浆者的四肢；无严重残疾，无严重功能性障碍及关节无红肿。无静脉注射痕迹。

答案

参考答案：对

解答题
在△ABC中，角A、B、C所对的边分别为a、b、c．设向量
m
=(sinA，cosB)，
n
=(cosA，sinB)
（I）若
m
∥
n
，求角C；
（Ⅱ）若
m
⊥
n
，B=15°，a=
6
+
2
，求边c的大小．
查看答案
单项选择题

A 10-year-old girl visits the clinic for a checkup before entering school. The child's mother questions the nurse about what to expect of her daughter's growth and development at this stage. Which response is most appropriate ？（）

A．"Her physical development will be rapid at this stage, and rapid development will continue from now on. "

B．"She'll become more independent and won't require parental supervision. "

C．"Don't anticipate any changes at this stage in her growth and development. "

D．"Friends will be very important to her, and she'll develop an interest in the opposite sex. "
查看答案