浙贝母鳞茎直径在3.5cm以下的商品称"珠贝"。（）
参考答案：对
What’s Jim doing over there? He’s_______ his friends.
A．talking
B．talking with
C．talks
D．talk
以振动压路机为例，对其液压系统的例行维护包括哪些作业项目？
