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牛乳中检出的黄曲霉毒素，应主要属于 A、黄曲霉毒素B1 B、黄曲霉毒素B2 C、黄曲霉毒素G1 D、黄曲霉毒素M1
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举一反三
【单选题】. --- Mr Smith, __________ girl wants to see you. --- If that’s __________ girl who has fair hair and wears a red dress, I want to see her.
A.
a; a
B.
a; the
C.
the; a
D.
a; /
【简答题】估算。 19×39≈ 31×21≈ 42×59≈ 13×28≈ 48×29≈ 51×51≈
【简答题】直接写得数． 51÷3= 990-99= 26×4= 59+41= 990÷11= 90÷6= 95÷5= 480÷8= 300-157= 3×43= 45万+67万= 9×8÷9×8=
【简答题】估算 74×22≈ 51×68≈ 59×92≈ 298+205≈ 432-228≈ 82÷8≈ 38×53≈ 77÷4≈
【简答题】47×67+35 2 -51×59+0.0 ． 7 +14.9 ． 2 =______．
【简答题】比较大小。 34+5○5+34 59-5○51+5 88-8○99-9 24+3○28-3
【单选题】Big cites today are confronted with very serious problems. Transport is a【C1】______difficulty: some planners believe in【C2】______transport system;others believe in making it possible for citizens to m...
A.
minor
B.
major
C.
little
D.
small
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