— Jack has made a decision.
— But I suggest that he should think it over so that he won't regret it later on.
A：advise
B：know
C：disagree
下列现象中不属于遗传的是（ ）
分子、原子、离子都是构成物质的微粒，下列物质由分子构成的是（ ）
—Yes，____ (she) can.
已知线段a=3cm，b=4cm，那么线段a、b的比例中项等于____ cm.
