将一个周长是6.28米的圆画在比例尺是1:100的图上,半径是[ ]
A.6.28cm
B.2米
C.1cm
答案:C
单词填空(6分)
小题1:It is my _________ / 'pleʒə/ to help you.
小题2:The population of our country is ______________/ɪn'kri:sɪŋ/ very fast.
小题3:Mr Black has ____________ /træns'leɪtɪd/ many Chinese books into English.
小题4:The ___________['tʃə:tʃɪz] in the USA are very famous.
小题5:I want to have my watch ___________ / rɪ'peəd/ because it doesn’t work .
小题6:The young people often hand out _______________ in the street.
[əd'və:tɪsmənts]
以下关于熔点测定方法的叙述中,正确的是
A.取供试品,直接装入玻璃毛细管中,装管高度为1cm,置传温液中,升温速度为每分钟1.0~1.5℃B.取经干燥的供试品,装入玻璃毛细管中,装管高度为1cm,置传温液中,升温速度为每分钟 1.0~1.5℃C.取供试品,直接装入玻璃毛细管中,装管高度为3mm,置传温液中,升温速度为每分钟3.0~5.0℃D.取经干燥的供试品,装入玻璃毛细管中,装管高度为3mm,置传温液中,升温速度为每分钟 1.0~1.5℃E.取经干燥的供试品,装入玻璃毛细管中,装管高度为1cm,置传温液中,升温速度为每分钟 3.0~5.0℃