通过监听一个信标来连接的客户端使用哪种类型的扫描()
A.被动的
B.经典的(classic)
C.主动的
D.快速的
参考答案:A
You must remember that you ______ feed the fish much. [ ]
A. don't need to
B. needn't to
C. don't need
D. not need
在考虑需求量与供应能力的平衡时,要考虑哪些因素?