流行性脑脊髓膜炎()流行性乙型脑炎()白喉()流行性出血热()风湿性心肌炎()
A. 出血性炎
B. 纤维素性炎
C. 变质性炎
D. 肉芽肿性炎
E. 化脓性炎
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We have received orders()US$1,000,000 since the new product was introduced to the market.
A. amountfor
B. amountto
C. accountfor
D. amountingto
微电子交流计数电码自动闭塞,其交流电压的允许波动范围是220V±()V。
A. 33
B. 34
C. 35
D. 36