若某人的血清中仅含有抗A凝集素，则其血型为
A．A型
B．B型
C．AB型
D．O型
E．Rh阳性
参考答案：B
解析：人的红细胞中含有A凝集原 (抗原)或B凝集原，而在血清中分别存在相应的抗A抗体(抗A凝集素)、抗B抗体(抗 B凝集素)。根据凝集原不同，血型可分为 ABO血型和Rh血型两个系统。若某人的血清中仅含有抗A凝集素，则其血型为 B型。
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| When you are invited to a meal in Thailand, the wards of the invitation 1 "come and eat rice". In fact 2 all Thai dishes are eaten with rice, which grows there easily 3 the climate is warm and there is much 4 . The food that is served is 5 cut into pieces, so there is no need to use knives and forks 6 , instead, special spoons and forks are used. The Thais 7 to eat with their hands and now there are still some people who eat this 8 . There is a special way of doing it. First they wash their 9 hands in a bowl of water, they only eat with their right hands. They are careful not to let the food 10 the palms of their hands. After the meal, the 11 are again carefully washed. The meal usually has several different 12 . They are all hot. They are served in bowls which everyone shares, 13 each person has their own bowl of rice. 14 Thailand has a long coastline, it is not surprising 15 fish and shellfish play an important part in Thai cooking.
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