更多"The usual way Americans signal thei"的相关试题:
[填空题]The usual way Americans signal their attention to their talking partners is to look at their eyes or mouths.
[单项选择]What is tile main problem caused by the usual way of ploughing?()
A. The crop’s blooming period is delayed.
B. The roots of crops are cut off.
C. The topsoil is seriously damaged.
D. The growth of weeds is accelerated.
[单项选择]
The usual way to ensure reliable delivery is to provide the (71) with some feedback about what is happening at the other end of the line. Typically, the protocol calls for the receiver to send back special (72) flame bearing positive or negative (73) about the incoming frames. If the sender receives a positive acknowledgement about a frame, it knows the frame has arrived safely. On the other hand, a negative acknowledgement means that’ something has gone wrong, and the frame must be transmitted again.
An additional complication comes from the possibility that hardware troubles may cause a flame to (74) completely. In this case, the receiver will not react at all, since it has no any reason to react. It should be clear that a protocol in which the sender transmits a frame and then waits for an acknowledgement, positive or negative, will hang forever if a frame is ever lost due to, for example, (75) hardware.
(71)处应填()。
A. receiver
B. controller
C. sender
D. customer
[单项选择]What is the main problem caused by the usual way of plowing?()
A. The crop’s blooming period is delayed.
B. The roots of crops are cut off.
C. The topsoil is seriously damaged.
D. The growth of weeds is accelerated.
[填空题] Chinese Americans
Chinese Americans are an ethnic minority in the
US. They used to be discriminated.
1. The history of Chinese immigrants
1) The first group of Chinese arrived during the
California (1) ______ in 1849. Their success invited (1)______
envy. They had to earn a living by doing the (2)______ (2)______
for the white miners, setting up restaurants, working as
farmhands or as (3) (3)______
2) The second group of Chinese arrived in the
early (4)______as laborers to construct the (4)______
(5)______ (5)______
3) After World War Two, more Chinese
were permitted to settle in America.
4) Today’s Chinese Americans are mostly the (6) (6) ______
______ of the first two groups of immigrants.
2. Some of their noteworthy characteristics as part
of their traditional culture
1) (7)______family ties (7) ______