以物理科学为依据创立的色立体是()。
A、孟谢尔表色系统
B、奥斯特瓦德表色系统
C、日本色彩研究会
D、英国色彩学会
参考答案:B
正式制度与非正式制度有何区别?
—You were driving at 100 km an hour, sir.
—But officer, I ________. My car can’t go more than 80.
A.may not have to
B.couldn’t have been
C.wouldn’t like to
D.needn’t to be