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【多选题】
已知某标样保证值(u)为110mg/L;某人对该标样测定5次,其结果为111 mg/L、112 mg/L、110 mg/L、113 mg/L、111mg/L,则测定平均值为_________、相对误差为____________。A.
111.4mg/L
B.
112mg/L
C.
2.27%
D.
1.27%
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【简答题】孔子被后世统治者尊为 、至圣、 、万世师表,被联合国教科文组织评选为” “ 之首。孔子和儒家思想对中国和半岛、日本、越南等地区有深远的影响。
【单选题】You are wet through. You ___________ in the rain.
A.
must come
B.
must have forgotten
C.
may catch
D.
must have got caught
【单选题】— The fish has gone bad! — You _____ it in the refrigerator. [ ]
A.
must not have keep
B.
must have kept
C.
should have kept
D.
should not have kept
【单选题】You must have learned Japanese for many years, ___________?
A.
haven't you
B.
must you
C.
mustn't you
D.
have you
【单选题】You are wet through. You ___ in the rain. [ ]
A.
must come
B.
must have caught
C.
may catch
D.
must have got
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