下列物质属于氧化物的是（ ）
A．氧气（O2）
B．氢氧化钾（KOH）
C．水（H2O）
D．氯酸钾（KClO3）
答案：C
日本对我国周边安全环境的威胁有哪些？
When in his rebellious years, that is when he was sixteen or eighteen, Frank Anderson ()going around with a strange set of people and staying out very late.
A. took to
B. took up
C. took on
D. took in
