A.血友病A凝血時(shí)間延長(zhǎng),而白陶土凝血活酶時(shí)間正常
B.血友病B凝血時(shí)間延長(zhǎng),而白陶土凝血活酶時(shí)間正常
C.血友病C凝血時(shí)間延長(zhǎng),而白陶土凝血活酶時(shí)間正常
D.血友病A凝血時(shí)間正常,而白陶土凝血活酶時(shí)間延長(zhǎng)
E.血友病B凝血時(shí)間和白陶土凝血活酶時(shí)間均延長(zhǎng)
A.胚胎6周
B.胚胎3周
C.胚胎8周
D.胚胎5周
E.胚胎10周