题目

甲、乙、丙是三种微生物，下表Ⅰ、Ⅱ、Ⅲ是用来培养微生物的三种培养基．甲、乙、丙都能在Ⅲ中正常生长繁殖；丙能在Ⅰ中正常生长繁殖，而甲和乙都不能；甲能在Ⅱ中正常生长繁殖，乙和丙都不能．下列说法正确的是（ ）粉状硫 10gK2HP04    4gFeS04 0.5g蔗糖 10g（NH4）2S04 0.4gH2O 100m1MgS04 9.25gCaCl2 0.5g Ⅰ++++-+++ Ⅱ+++-++++ Ⅲ++++++++ A．甲、乙、丙都是异养微生物 B．甲、乙都是自养微生物、丙是异养微生物 C．甲是自养微生物、乙是异养微生物、丙是固听下面的对话，回答7〜 9小题。() 7. Where will Helen spend her summer va cation?   A. In Sydney. B. In Moscow.   C. In Shanghai.() 8. How long will Jack stay at New York?   A. For a week. B. For a month.   C. For a year.() 9. Who will Jack go with?   A. His uncle. B. His daughter.   C. His cousin.