Which of the following relationships most closely parallels the relationship between the proton and the electrons described in the passage
A hawk to its prey
B. A blueprint to a framework
C. A planet to its satellites
D. A magnet to iron filings
E. A compound to its elements
查看答案
By referring to the period at the end of the sentence (lines 16-18), the author intends to point up the atom' s
A. density
B. mystery
C. velocity
D. consistency
E. minuteness
GLINT : LIGHT ::
A. blare : sound
B. whiff : scent
C. shade: color
D. glut: food
E. wave : tide
PANDEMONIUM:
A. amusement
B. indolence
C. deceleration
D. tranquillity
E. tolerance
3岁儿童，食欲差，经常挑食偏食，喜欢吃小食品、喝糖饮料，经常感冒发热，学习成绩差，记忆力不好。医生查体：身体瘦小，皮肤黏膜苍白，此时应该考虑首先检测的生化指标是
A. 血清1，25-(O2维生素D3
B. 血红蛋白
C. 血清铁蛋白
D. 红细胞内游离原卟啉
E. 血细胞比容
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