研究表明,母体长期缺______,可能会影响胎儿骨骼正常发育,使出生婴儿易患佝偻病,孕妇也易患骨质软化病。
A.铁
B.锌
C.碘
D.钙
正确答案是D
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Complete each of the following sentences with a word derived from the one given in the bracket.
The thought of losing the race was ( )to him. (bear)
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