（）is not a physical wall, but a lot of virtual data to protect the computer network.

[单选题]（） is not a physical wall, but a lot of virtual data to protect the computer network.A . Date wallB . Date channelC . DatabaseD . Firewall

[单选题]（）is not a physical wall but a flow virtual data to protect the computer network.A . data wallB . data channelC . databaseD . firewall

[单选题]The Great Wall is _______ tourist attraction that millions of people pour in every year.A． so a well-known B. a so well-known C. such well-known a D. such a well-known

[单选题]Oil is supplied to the cylinder wall and （） by means of mechanical lubricators.A . the cylinder coverB . the piston ringsC . the piston crownD . the piston skirt

[主观题]They eat a lot of potatoes. We eat a lot, too. (改为同义句)They eat a lot of potatoes. ____ _____ _____.

[单选题])7．—Was there a nice picture on the wall?—＿＿＿＿＿＿．A． No，there wasn'tB． No，there weren'tC． No，there isn' tD． No，there aren't

[试题]PowerDesigner Physical Architect是 ______工具。

[单选题]3． _______the Great Green Wall，the land produces more crops．A．Thanks forB．Thanks toC． Thank toD． Thank for

[主观题]There were many pictures on the wall．（改为一般疑问句）________,________many pictures on the wall?

[单选题]Cylinder wall temperature, fuel oil supplier, and oil passage （）.A . are interdependentB . are not interdependentC . have nothing to do with each otherD . are independent