人体吸入的空气中,含量最多的是 [ ]
A.氧气
B.氮气
C.水蒸气
D.二氧化碳
答案:B
Without worrying about anything, she abandoned herself ________ a life of pleasure.
A.with
B.of
C.to
D.on
婴儿体液总量占体重的()
A.90%
B.35%
C.78%
D.70%
E.55%