For an n-type GaAs MESFET, the work function difference in the gate junction is:
A. qΦm>qΦs
B.qΦm C.qΦm=qΦs
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The advantages of HEMTs include ( ).
A. high resistance
B. large carrier density
C. high carrier mobility
D. easily fabricated
What is the center of Krashen’s second language learning theory?
A. The monitor model
B. The learning/acquisition distinction
C. The affective filter hypothesis
D. The natural order hypothesis
Which is not the characteristic of acquisition?
A. Subconscious
B. Implicit knowledge
C. Similar to child’s first language acquisition
D. Formal teaching does help
The learned system acts only as a “monitor” to initiate the second language learner’s utterance and is responsible for fluency and intuitive judgement about the correctness. ( )
A. 对
B. 错