【单选题】屋面防水中泛水高度最小值为 ( ) mm
【单选题】In paragraph 2, 'such a reaction' refers back to______.
A.
making a choice between 'flight or fight'
B.
reaction to stress both chemically and physically
C.
responding to crises quickly
D.
losing heart at the signs of difficulties
【单选题】---What are you doing ,Jack? ---I’m making a model car. I _______ it in the science class at 10 o’clock tomorrow morning.
【简答题】车用清洗剂的作用是清洁车身表面及零部件,需采用()。