A Chinese student makes a sentence as followsHe is a rich man who like traveling.The error in that sentence is the result of ____ .

LIFTING THE ANCHOR FROM THE BOTTOM is called（）.

The bank who opens the L/C is called（）.

The bank who opens the L/C is called（）.

The telephone line is（）busy at the moment.

【A popular service that has attercted the interest of companies and has home users alike is the sending of voice signals over an IP-based network, such as the Internet. The practice of making telephone calls over the internet has had a number of different names, including packet voice, voice over packet, voice over the internet, internet telephone, and Voice over Ip（Voip）. But it appears the industry has settled on the term”Voice ove IP” in reference to the internet protocol, which controls the transfer of data over the internet. There are currently three ways to deliver VoIp to users, the first technique is found at the corporate level. Many companies are offering VoIP systerms that operate over a local area network. These systems involve a fair amount of equipment, such as VoIP servers, special IP-enabled telephones, and routers that can direct telephone calls. Today a large portion of corporate sites have converted their older internal telephone systems to VoIP systems that opreate over a LAN, thus converging two systems into one. A second common solution is the one often encountered at home. Using existing telephones, a special converter is added between the telephone and a high speed internet（DSL or cable modem）connection. The converter digitizes the voice signal and creates a stream of packets that are then sent over an ip connection.The third technique involves smart cell phones. Never cell technologies are all packet-based, thus requiring a telephone call to be converted to digital packets and sending those packets over IP networks.】

Which is the correct way to connect to both the target database and the recovery catalog from the RMAN command line？（） Assume that the target database is called ORCL and that the recovery catalog database is called RCAT. Also assume that the recovery-catalog owner is called RCAT_OWN. Assume the environment is configured for the ORCL database. 

Which of the following security threats involves making phone calls?（）

The geometric center of the waterplane area is called the（）.

At a college basketball game, the ratio of the number of freshmen who attended to the number of juniors who attended is 3：4. The ratio of the number of juniors who attended to the number of seniors who attended is 5：6. What is the ratio of the number of freshmen to the number of seniors who attended the basketball game?

The geometric center of the waterplane area is called the（）.