内源性与外源性凝血的根本区别是______
生态系统发展到______阶段时，生物量可达到最大值，而实际的增长率极小。
种群数量在一年内的变化规律称为______。
He ______ that he was going to visit his sister in Ohio.
阅读辛弃疾《摸鱼儿》，然后回答小题。 更能消、几番风雨，匆匆春又归去。惜春长怕花开早，何况落红无数。春且住!见说道、天涯芳草无归路。怨春不语。算只有殷勤，画檐蛛网，尽日惹飞絮。 长门事，准拟佳期又误。蛾眉曾有人妒。千金纵买相如赋，脉脉此情谁诉?君莫舞。君不见，玉环飞燕皆尘土!闲愁最苦。休去倚危栏，斜阳正在，烟柳断肠处。
腹直肌______
______the past year as an exchange student in Hong Kong, Linda appears more mature than those of her age.
简述罗马法关于直系血亲、旁系血亲的亲等计算方法。
关于艺术起源有多种学说，试举三种重要学说。
如果你们能够提供满意的售后服务，你们的产品在这里会有很广阔的市场。
A: Hello, Blue Sky Hotel. Can I help you?B: Yes. Could you find out for me whether you have any vacancies tomorrow night?A: Yes, we have some. What kind of rooms would you like to have?B: Two single rooms, please. By the way, what facilities can you offer?A: We have telephones, air conditioners, TV sets and washing machines in our rooms.
在一定教学理论或教学思想指导下
He (suggested) that she (met) with her lawyer (before) signing the (final) agreement.
The desk over there_____hard wood.
Hong Kong's Disneyland theme park will open on September 12, 200
下列关于视锥细胞的叙述，错误的是______
______ arriving at the spot, the policemen at once helped the passengers to safety.