If a periodic signal is applied to an LTI system, which are true in the following statements. （)

Which of the following are true of Ethernet technology?

A．Hosts use a logical ring topology.

B．Hosts use a logical bus topology

C．Hosts must wait for an electronic signal to transfer data.

D．Hosts are directly connected to a wiring concentrator called a MSAU.

E．None of the above

Of the following, which is NOT the way TV signals travel?

A．In a curve.

B．In a straight line.

C．In all directions.

D．Toward the horizon.

Which of the following is NOT true of the robot built by Srinivasan?

A．It was directed by signals converted from the electrical activity in Belle's brain.

B．It converted the electrical patterns into instructions for the other robot.

C．It was six hundred miles a way from where Belle was.

D．It could perform. the sa me-function as Belle did.

Which of the following, if true, would most strengthen the hypothesis mentioned in lines 17-19?

A．Researchers are able to train anteaters to break into an underground chamber that is emitting a strong electrical signal.

B．Researchers are able to detect a weak electrical signal emanating from the nesting chamber of an ant colony.

C．Anteaters are observed taking increasingly longer amounts of time to locate the nesting chambers of ants.

D．Anteaters are observed using various angles to break into nests of ants.

E．Anteaters are observed using the same angle used with nests of ants to break into the nests of other types of prey.

Which of the following is NOT true of the robot built by Srinivasan?

A．It was directed by signals converted from the electrical activity in Belle's brain.

B．It converted the electrical patterns into instructions for the other robot.

C．It was six hundred miles a way from where Belle was.

D．It could perform. the sa me-function as Belle did.

CDMA for cellular system can be described as follows. As with FDMA, each cell is allocated a frequency （71） , when is split into two parts, half for reverse (mobile unit to base station) and half for （72） (base station to mobile unit). For full-duplex （73） , a mobile unit both reverse and forward channels. Transmission is in the form. of direct-sequence spread （74） , which used a chipping code to increase the data rate of the transmission, resulting is an increased signal bandwidth. Multiple access is provided by assigning （75） chipping codes to multiple users, so that the receiver can recover the transmission of an individual unit from multiple transmissions.

A.ware

B.signal

C.bandwidth

D.domain

Which one of the following is the safety signal ().

A.SSS

B.TTT

C.XXX

D.FFF

Which of the following is NOT true of the robot built by Srinivasan?

A．It was directed by signals converted from the electrical activity in Belle's brain.

B．It converted the electrical patterns into instructions for the other robot.

C．It was six hundred miles away from where Belle was.

D．It could perform. the same function as Belle did.

Which of the following statements about the individual gustatory neuron is true, based on information provided by the passage?

A．It creates a neurological signal only when it comes into contact with its primary tastant.

B．Its function is not to identify tastes, but to identify similarities and differences between them.

C．Its primary importance is in distinguishing between the various qualities of a mixed stimulus.

D．It provides roughly equivalent signals when in contact with a major stimulus and a minor one.

E．It plays a fairly minor role in the across-pattern theory, compared to the labeled-line theory.