测量的效度
参考答案:
调查结果说明调查所要说明的问题的正确程度。
Mr. Smith was so angry at all ________ Robert was doing _________ he walked out angrily.
A.that; what
B.that; that
C.which; which
D.what; that
前方标志指示路右侧是高速公路临时停车处。