伊氏锥虫病的主要传播媒介是（）
A.库蚊
B.虻和吸血蝇
C.采采蝇
D.白蛉
E.蜻蜓
参考答案：B
根据对话填写数字。
A: Hello, Amy. How many apples are there on the table?
B: Twelve. Hi, Sarah. How many flowers are there?
A: Twenty. I have six oranges. How many ants are there on the floor?
B: Wow! There are thirty.
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充血性心力衰竭的症状不包括( )。
A．呼吸浅表，增快 B．面色苍白或青灰C．脉细速，心率可达160～180次/分 D．尿少、肝大E．脉压增宽，＞6.7kPa(50mmHg)
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