2014年某企业占用某市二等地段土地6000平方米，三等地段土地12000平方米（其中1000平方米为该企业幼儿园用地，200平方米无偿供派出所使用）；2014年4月1日该企业在城郊征用耕地4000平方米被批准，该耕地当年已经缴纳耕地占用税；同年8月批准征用非耕地6000平方米。该企业2014年应缴纳城镇土地使用税共计（）元。（城镇土地使用税年税额：二等地段7元／平方米，三等地段4元／平方米，城郊征用的耕地和非耕地1.2元／平方米）。

A.87000

B.87600

C.92400

D.96000

Let us now see how randomization is done when a collision occurs. After a ______, time is divided into discrete slots whose length is equal to the worst-case round-trip propagation time on the ether (2t). To accommodate the longest path allowed by Ethernet, the slot tome has been set t0 512 bit times, or 51.2μsec.

A.datagram B.collision C.connectionD.service

After the first collision, each station waits either 0 or 1 ______ times before trying again. If two stations collide and each one picks the same random number, they will collide again. After the second collision, each one picks either 0, 1, 2, or3 at random and waits that number of slot times. If a third collision occurs (the probability of this happening is 0.25), then the next time the number of slots to wait is chosen at ______ from the interval 0 to 2³-1.
In general, after i collisions, a random number between 0 and 2ⁱ-1 is chosen, and that number of slots is skipped. However, after ten collisions have been reached, the randomization ______ is frozen at a maximum of 1023 slots. After 16 collisions, the controller throws in the towel and reports failure back to the computer. Further recovery is up to ______ layers.