己酸乙酯是浓香型的主题香,却是()的杂味。
A、浓香型
B、酱香型
C、米香型
D、清香型
参考答案:D
隧道通风系统包括区间隧道通风系统和()两部分。
It took _____ half an hour _____ his homework.[ ]
A. her, do
B. him, do
C. him, to do
D. him, doing