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【单选题】
下列说法正确的是( )。
A.
游离棉酚对有害而结合棉酚则无害
B.
鲤鱼饲料中磷含量偏低,则鲤鱼肥下降
C.
采取收集自然排粪法测定鱼体对饲料的消化率会使结果偏低
D.
1% 系列的添加剂预混料除了能补充各种微量营养成分外还能满足动物对钙磷的需要
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参考答案:
举一反三
【单选题】神经细胞动作电位上升支是由于
A.
K 内流
B.
K 外流
C.
Na 内流
D.
Na 外流
E.
Ca 外流
【简答题】Mr. North’s extension number is .
【判断题】一般社交书信结束语比正式信函语简单多了,可用Amitiés, Amitiésà toi, pensées amicales等。
A.
正确
B.
错误
【单选题】Mr. Brown used to ________ several newspapers before breakfast.
A.
look into
B.
look up
C.
look through
D.
look around
【单选题】神经细胞动作电位上升支是由于
A.
K+内流
B.
K+外流
C.
Na+内流
D.
Na+外流
E.
Ca2+外流
【单选题】— Why Mr. Wang was _____ the general manager of north area? —Because his excellent in sale. [     ]
A.
appointed to be
B.
made as
C.
sent to
D.
chosen to
【单选题】-Why was Mr. Wang ________the general manager of north area? -Because of his excellence in sale. [     ]
A.
appointed to be
B.
made as
C.
sent to
D.
choose to
【单选题】—Look, Mr. King is swimming in the pool. —It ________ be Mr. King. He has gone to Kunming on vacation. [     ]
A.
can
B.
can't
C.
must
D.
mustn't
【单选题】The policeman was there ______.
A.
to look for Mr. Hill's uncle
B.
to see Mr. Hill about some trouble at the hand
C.
to visit Mr. Hill, his uncle
D.
to meet his mother
【单选题】神经细胞动作电位上升支是由于
A.
K + 外流
B.
Na + 内流
C.
Na + 外流
D.
K + 内流
E.
Ca 2+ 内流
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