A：different; different; differently
B：differences; differences; different
C：differences; different; differently
D：differently; difference; different
下列属于生态系统的是（ ）
下列哪一项不是单倍体育种的优点
已知M（x0，y0）是双曲线C： x22−y2 =1上的一点，F1，F2是C的两个焦点，若 MF1→⋅MF2→ ＜0，则y0的取值范围是（ ）
下列句子中文言句式不同于其他三项的是 （ ）
—I am really struck by your spoken English. You speak so fluently. Have you been abroad?
—Yes. I ______ in London for two years.
