问题
单项选择题
当焙烧铸圈的温度升至900℃时,需维持()
A.10min
B.5min
C.15~20min
D.1h
E.2h
答案
参考答案:C
当焙烧铸圈的温度升至900℃时,需维持()
A.10min
B.5min
C.15~20min
D.1h
E.2h
参考答案:C
从方框中选择最佳选项完成对话,有两项多余。 | |
A: Is that your new pen pal, Lily? B: 1 A: Oh, what's her name? B: Her name is Jane. A: 2 B: She's from Australia. A: 3 B: She lives in Sydney. A: Does she have any brothers or sisters? B: 4 She has two brothers and one sister. A: 5 B: She speaks English.
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