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【单选题】
导致先天性甲状腺功能减退症的最主要病因是A.
甲状腺不发育或发育不全
B.
甲状腺素合成途径缺陷
C.
促甲状腺激素缺乏
D.
甲状腺或靶器官反应性低下
E.
碘摄入过多
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The higher a rocket flies, ______air it meets.
A.
the fewer
B.
the little
C.
the less
D.
the much
【单选题】According to the passage, the higher a tree grows, ______.
A.
the stronger it becomes
B.
the more sunlight it will get
C.
the thinner it will be
D.
the thicker it will be
【判断题】The higher a company's debt ratio is, the higher the risk of a company not being able to meet its obligations.
A.
正确
B.
错误
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