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【单选题】
关于动作电位特性的正确描述是A.
动作电位会发生空间总和
B.
动作电位的幅度与刺激强度成正比
C.
动作电位的幅度不随刺激强度而改变
D.
动作电位会发生时间总和
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【单选题】Ice-cream is unhealthy, so I ______ eat it.
A.
always
B.
usually
C.
sometimes
D.
never
【单选题】Which of the following is proper for describing ice cream?
A.
There are no specific rules that define what can and can’t be labeled “ice cream”.
B.
Usually there is only 5 percent milk fat in ice cream.
C.
Not just any frozen treat can be called ice cream.
D.
Any frozen treat can be called ice cream..
【单选题】Direction:read each passage and identify how the information is being organized. 1. Ice-cream is a delicious frozen treat that comes in a many different colors and flavors. Two of my favorite flavors ...
A.
cause and effect
B.
sequence / process
C.
compare and contrast
D.
chronological
【简答题】抢救触电者的第一步就是使触电者尽快脱离电源,主要方法有哪些
【简答题】车辆调度应该考虑哪些方面
【单选题】按标准数密度时,测量长度有什么要求,以下要求是正确的
A.
每厘米大于40根纱线，测量长度为10cm
B.
每厘米大于40根纱线，测量长度为5cm
C.
每厘米大于40根纱线，测量长度为2cm
D.
每厘米大于40根纱线，测量长度为1cm
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