The tall tree, leaves are darker than those of the other two, was planted when my grandpa was young（）

A . multipart-to-multipoint EVC （E-LAN） B . hub spoke EVC （E-Tree） C . point to point EVC （E-Line） D . rooted multipoint EVC （E-Tree） E . point-to-multipoint EVC （E-Tree）

A . both B . either C . every D . all

A . see which B . seeing that C . to see that D . see to it that

A . Memory requirements are higher for shared distribution tree than for source distributiontree. B . Creates a tree from a central RP to all last-hoprouters. C . Uses a rendezvous point. D . An optimal path is created between each source router and each last-hoprouter. E . Place（S，G）entry in each router’smulticast routing table. F . Place（*，G）entry in a router’smulticast routing to table.

A . Designated port B . Nonswitch port C . Switch port D . Nonroot port E . Nondesignated port F . Root port

A . Learning B . Spanning C . Listening D . Forwarding E . Initializing F . Filtering G . Permitting

A . plant B . planting C . being planted D . planted

A . lowest root bridge ID B . lowest path cost to root bridge C . lowest sender bridge ID D . highest port ID E . highest root bridge ID F . highest path cost to root bridge

A.to red B.red C.to be red D.into red

dare say; dares to climb dare to say; dare climbing dare saying; dares climb dare to say; dares climbed

A．impartially B．impassably C．incrementally D．melodiously

A.where B.of whose C.whose D.which

Banana plants need a lot of care and attention. They must be provided with water if the normal rainfall doesn't supply enough. The area around the plants must be kept free of weeds and grass. About nine or ten months after planting, a flower appears on the banana plant. This flower is at the end of a long stalk(茎), which grows from the base up through the center of the stem and turns downward when it comes out from the top. Small bananas form. on this flower stalk as it grows down- ward. Bananas really grow upside down. As the small bananas form. on the stalk, they point down- ward, but as they grow they mm and point upward. Bananas are harvested while they are still green. Even when they are to be eaten where they are grown, they are not allowed to ripen on the plant. A banana that turns yellow on the plant loses its taste. The first paragraph in the text mainly discusses ______. A．why the banana tree is not a tree B．how the banana grows on the stem C．why the stem of the tree is wood D．how the leaves grow out of the stem

To: Mack From: President Subject: Stopping Rent Date: April 25, 2003 It is decided at our monthly meeting that we are going to relocate our office this May and have to stop renting the present one. Please send a fax to the Administration Department, telling them about our decision and explaining the reason for our relocation. ？ Send a fax to the Administration Manager of your present office building: ？ telling him your decision of stop renting their office ？ explaining the reason for the relocation ？ expressing your thanks for their full support during your rent ？ asking him to contact you if he has any questions. ？ Write 60-80 words. ？ Write on your Answer Sheet.

此题为判断题(对，错)。

B.lool C.looking D.looked

A．fell from B．fall down C．fall off D．fall to