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【简答题】
食品中细菌污染的途径有哪些？
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反馈参考答案：
举一反三
【单选题】下图中a→d表示连续分裂的动物细胞的两个细胞周期。下列叙述中不正确的是 [ ]
A.
a过程完成中心体的复制
B.
染色体平均分配一般发生在d段
C.
b和c为一个细胞周期
D.
c段结束DNA含量增加一倍
【单选题】Working with the medical team in Africa has_________the best in her as a doctor. A. held out B. brought out C. picked out D. given out
A.
1
B.
2
C.
3
D.
4
【单选题】在一个细胞周期中，可能发生在同一时期的变化是 [ ]
A.
DNA复制和中心粒复制
B.
染色体数加倍和染色单体形成
C.
细胞板的出现和纺锤体的出现
D.
着丝点的分裂和同源染色体的分离
【简答题】看图完成句子 1. She can _____ . 2. They can _____ . 3. They can _____ _____ . 4. She can _____ _____ _____ . 5. He can _____ _____ .
【单选题】—Can you tell us your for happiness and a long life? —Living every day to the full, definitely.
A.
recipe
B.
record
C.
range
D.
receipt
【单选题】He wanted to join the medical team to help the victims in the earthquake but he______for his poor health．
A.
was turned up
B.
was turned on
C.
was turned over
D.
was turned down
【简答题】In relation to the law of contract: (a) defi ne an offer; (5 marks) (b) explain the specifi c meaning and effect of (i) a counter-offer; (3 marks) (ii) a unilateral offer. (2 marks)
【单选题】There were no doctors in the poor area, ________ the medical team had to work hard. [ ]
A.
so
B.
though
C.
unless
【单选题】动物的胚胎干细胞具有不断分裂与分化的能力，下列叙述错误的是 [ ]
A.
DNA和中心粒的复制均发生在细胞分裂间期
B.
染色体的着丝点分裂时仍有蛋白质合成
C.
胚胎干细胞经诱导分化形成神经细胞后丧失细胞全能性
D.
温度降低能导致细胞周期延长
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