The suggestion that the CEO()the prizes is welcomed by all.
A. would present
B. present
C. presents
D. ought to present
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Since the good sare()stock,they cannot be supplied()stock.
A. out of,at
B. outside,from
C. without,from
D. out of,ex
电压也称电位差,电压的方向是由低电位指向高电位。
A. 正确
B. 错误