[单项选择]Ann covered it with Christmas lights.

[单项选择]

We have already covered the topic of network addresses. The first  (1) in a block (in classes A, B, and C) defines the network address. In classes A, B, and C,if the hostid is all ls,the address is called a direct broadcast address. It is used by a(2) to send a packet to all hosts in a specific network. All hosts will accept a packet having this type of destination address. Note that this address can be used only as a (3) address in an IP packet. Note also that this special address also reduces the number of available hostid for each netid in classes A,B，and C． In classes A, B, and C, an address with all ls for the netid and hostid (32bits) define a (4) address in the current network.A host that wants to send a message to every other host can use this address as a destination address in an IP packet. However, a router will block a packet having this type of address to confine the broadcasting to the (5) network. Note that this address belongs to class E.

空白（1）处应选择（）
A. datagram
B. function
C. address
D. service

[单项选择]
What is covered in the price of the tour
A. All transportations during the tour.
B. Equipment for the hiking adventure.
C. Two nights’ stay in Salt Lake City.
D. Three formal meals a day.

[单项选择]A) concealed C) hidden
B) covered D) disguised.


A. concealed
B. covered
C. hidden
D. disguised.

[单项选择]Which of the following risks are covered by the ALL Risks coverage of PICC Ocean Marine Cargo Clauses( ).
A. war and fire
B. strike and delay
C. aflatoxin and on deck
D. heavy weather and fire

[简答题]

Freight and insurance：to be covered by the buyer

[单项选择]

Never laugh at a snow covered mountain! Laughter and yelling, during the avalanche season, can cause a deadly pile of snow. Huge snow slides are most common in mountains where there are steep slopes that are well buried in snow and ice. The snow builds up slowly and lands very softly. This can create a very touchy, unstable situation. Tons of snow may be held up by only the friction between snowflakes. The deep snow is like a house of cards. The slightest movement can cause it to fall. As soon as something slips, this great mass of snow will come crashing down the mountainside.
Slides may be started by sound vibrations. They may also be started by the weight of wet, melting snow. Once an avalanche has been triggered, the cause no longer matters. Moving down a steep slope, it picks up great speed and added snow. Some avalanches travel as fast as two hundred miles per hour. The force of an avalanche will mow down anything in its path. Whole houses have been swallowed
A. falling snow
B. the wind
C. loud sounds
D. friction between snowflakes

[单项选择]Ann is ______ girl.


A. an English
B. a Chinese
C. an American

[单项选择]Ann is in ______.


A. Grade One
B. Grade Three
C. Grade Two