A: are of the same frequency.
B: are of the same frequency and amplitude.
C: are of the same amplitude, and maintain a constant phase difference.
D: are of the same frequency, and maintain a constant phase difference.
举一反三
- The difference between a histogram and a frequency polygon is:
- Phase lag compensation can reduce the cut-off frequency of the system after compensation by means of_____ in the intermediate and high-frequency band of the original system, so as to obtain sufficient phase margin with the help of the phase at this frequency of the original system. A: magnitude attenuation B: phase lag C: magnitude increase D: magnitude unchanged
- The index of coincidence: A: can tell you the likelihood that a key is the same length as the ciphertext B: can tell you the likelihood that some ciphertext has the same frequency counts as English C: can distinguish between mono and polyalphabetic substitution ciphers D: a and b only.
- There is no difference between the cultures that are classifying into the same categories as either high or low-contact.
- The difference between a histogram and a frequency polygon is: A: the frequency polygon is reported as a percent, a histogram does not report percents. B: the histogram shows frequencies while a frequency polygon shows cumulative frequencies. C: the bars in a histogram and a frequency polygon cannot be adjacent. D: open-ended classes can be accommodated with a frequency polygon.
内容
- 0
The two houses were not ______. A: of the same style B: designed by the same designer C: the same looking from the outside D: the same looking from the inside
- 1
19.____ might be said of the problem. A: Such B: Same C: The same D: So
- 2
The missing word in "I look the one______traveled by,/And that made all the difference. " is______. A: never B: less C: the same D: more
- 3
Exchange Difference is：（ ） A: The difference between two different currencies. B: The difference calculated from reporting the same number of units of a foreign currency, in the presentation currency, at different exchange rates. C: The average difference between the exchange rate at the beginning and end of a period.
- 4
What are the analogous organs? A: Deveopled from different sources B: Deveopled from same sources C: But with the different function D: But with the same function