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【单选题】
牙萌出的生理特点描述不正确的是A.
按一定先后顺序
B.
在一定时间内
C.
左右成对称同时萌出
D.
下颌牙略早于同名上颌牙
E.
同一颗牙齿的萌出时间男性略早于女性
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反馈参考答案：
举一反三
【单选题】A group of mice was released into a large field to which no other mice had access. Immediately after the release, a representative sample of the mice was captured, and the fur color of each individual...
A.
The allele for gray fur color is unstable, and over twenty years most of those alleles mutated to become alleles for black fur.
B.
The field was composed primarily of light-colored soil and little vegetation, affording gray mice protection from predators.
C.
Sexual selection led to increased mating frequency of black and brown versus gray and brown.
D.
The gray mice were hardest to capture and so were underrepresented in the twenty-year sample.
【单选题】如图所示,为Y-△降压起动电路,若与KT线圈串联的常闭辅助触点因故不闭合,其他均正常,则在合上QS三相电源开关,按下SB2后,电动机会______。
A.
电动机只能Y起动和运转
B.
电机仍能Y降压起动，△运转
C.
电机△起动，Y运转
D.
FU4、FU5熔断
【简答题】提出'教育即生活'、'教育即生长'的教育家是（ ）。
【单选题】A 60-year-old previously healthy man sees his physician because he feels feverish and weak. He reports passing dark-colored urine on several occasions during the past month but has no urinary frequenc...
A.
Straining of urine for calculi
B.
Urine microbiologic culture
C.
Abdominal CT scan for renal mass
D.
Collection of a 24-hour urine specimen for protein
E.
Percutaneous renal biopsy
【单选题】The crystal thickness and transducer frequency are related. Lower the crystal thickness
A.
The lower the frequency
B.
The higher the frequency
C.
There is no appreciable affect
D.
None of the above
【简答题】杜威提出教育即生长 、教育即生活 、( )。
【简答题】一个完整的数字博物馆至少包括: 1 2 3
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