凡士林（）
A.油脂性基质
B.促渗剂
C.水溶性基质
D.保湿剂
E.稠度调节剂
参考答案：A
解析：凡士林是油脂性基质。PEG是水溶性基质。
. China’s quick reaction and the public efforts have ________ the rapid restoration（恢复）and reconstruction of Wenchuan.
A．applied to
B．contributed to
C．adjusted to
D．resulted from
DNA中的______啶碱与RNA中的______嘧啶碱的氢键结合性质是相似的。
