沿海地区及大面积水域的湖泊上白天出现的海风或湖风是（）.
A、由水上吹向陆地
B、由陆地吹向水上
C、顺时针方向吹
D、逆时针方向吹
参考答案：A
用所给单词的适当形式完成句子。
1. Is it right _______ (experiment) on animals?
2. What's the ________ (mean) of this? Why have you left your clothes untidily on the floor?.
3. We hired two rooms with _______ (connect) doors.
4. We are collecting _______ (donate) for the homeless children.
5. Our teacher __________ (communicate) his ideas very clearly.
发明和实用新型取得专利权的条件是（）
A.具有经济价值
B.创造性
C.实用性
D.新颖性
E.先进性
