什么是行车视距？
参考答案：
行车视距是驾驶员在驾驶过程中的通视距离。
用括号中所给词的正确形式填空。
1. Lucy is Lily's _____ (sister).
2. Andy _____ (be) my cousin.
3. We _____ (be) good friends.
4. I _____ (have) a photo of Millie.
5. Mary is polite and _____ (help).
The nurse is caring for an elderly female with osteoporosis. When teaching the client, the nurse should include information about which major complication ？（）
A．Bone fracture.
B．Loss of estrogen.
C．Negative calcium balance.
D．Dowager's hump.
