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工作于放大模式的晶体三极管中几乎相等的两种电流是
答案:
IE和IC
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II. Vocabulary and Grammar. (60 %)
Multiple Choice Directions: In this section there are some incomplete sentences. For each sentence there are four choices marked A, B, C and D. Choose the ONE answer that best completes the sentence. Then type the corresponding letter in the blank on the web page.
1. His speech yesterday ____ many workers into action.
A、halted
B、galvanized
C、stopped
D、slumped
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具有炎症介质作用的补体成分是 A.
MAC B.
C3a和C5a C.
C3b D.
C4b2a
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