一般情况下,原油从加热炉对流室获得的热量约占总热量的()。
A、30%
B、40%
C、50%
D、60%
参考答案:D
关于血友病A/B的遗传方式,叙述正确的有()
A.血友病A是常染色体不完全隐性遗传
B.血友病A女性为携带者,男性发病
C.没有家族史,不能诊断血友病A/B
D.血友病B女性为携带者,男性发病
E.血友病B主要见于女性
—I don't know how to deal with these old books.
— _____ giving them to the children from poor families?[ ]
A. What about
B. Why don't you
C. Shall we
D. Why not