常可导致牙龈肿胀、口腔溃疡的是（）
A.急性粒细胞白血病
B.急性早幼粒细胞白血病
C.急性单核细胞白血病
D.红白血病
E.急性淋巴细胞白血病
参考答案：C
解析：急性淋巴细胞白血病以儿童多见，肝、脾、淋巴结肿大明显。M型即急性早幼粒细胞白血病，该型白血病细胞内含有大量促凝物质，容易引起DIC。M型即急性单核细胞白血病，白血病细胞浸润使牙龈增生、肿胀。
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2______ how many people are using it. Some English children study French. French is also a very important 3______. Some other children study German, Russian, 4______ and Chinese. Which is the best way to learn a foreign language? We know that we all learn our own language 5______ when we are children. If we learn a second language in the same way, it won't seem so difficult. 6______ does a small child hear his mother's tongue (语言)? He 7______ what people say, and he tries to guess what he hears. When he wants something, he has to 8______ it, and he is using the language, 9______ in it and talking in it all the time. If people use a second language all the time, they 10______ it quickly. |