题干
37. All animals, ______ their size, breathe once for every four heartbeats.
A：however
B：whatever
C：no matter
D：in spite of
答案(点此获取答案解析）
B
A：however
B：whatever
C：no matter
D：in spite of
所示，β-月桂烯与Br2发生1:1加成反应的产物(只考虑位置异构)理论上最多有 ( )