地埋线的沟底应平坦、坚实,无石块和坚硬杂物,并敷设一层100~200mm厚的松软细土或细砂,当地形变化时,应作平缓斜坡。()
参考答案:对
用括号中所给词的正确形式填空。
1.Lucia _______________(win) the first prize in last week’s speech competition.
2.We _______________(hold) a sports meeting last weekend.
3.Bruce _______________(visit) his grandparents next Sunday.
4.Did you have fun _______________(play) tennis yesterday?
5.He learned _______________(ride) a bike when he was nine years old.
服务营销不同于一般的市场营销,但并不存在本质上的差别,两者在()上都是一致的。
A、基本原理
B、理论
C、方法
D、策略