关于柑桔全爪螨,错误的是()
A.冬季温暖地区无休眠现象
B.以卵和成螨在枝条裂缝中和叶背越冬
C.7~8月高温高湿时,数量很多
D.发育和繁殖的适宜温度20~30℃
参考答案:C
I have ______ friends at school. I like playing with ______. [ ]
A. much; they
B. many; them
C. a lot of; their
D. lots of; theirs
空气密度的变化将()机械式风表的转速。
A、影响
B、无影响
C、轻微影响
D、短期影响