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问题 名词解释

黄热病毒属（Flavivirus）

答案

参考答案：

以节肢动物作为传播媒介，是一大群具有包膜的单正链RNA病毒.主要的黄热病毒成员有乙脑病毒，森林脑炎病毒和登革热病毒.

补全对话，情景问答

补全下列对话：

A: Hi! Sonia. This is your letter.

B: 1.________ Oh, it's 2.________  my pen pal, Mike.

A: What's in it?

B: There are some 3.________  in it. Look! In the first photo, he's 4.________  basketball at school. In the second photo, he's swimming at the 5.________ .

A: How nice! What are they 6.________  in the next photo?

B: They're 7.________  dinner.

A: And the last photo?

B: He's 8.________  his sister, Gina. Gina is doing 9.________  homework. Mike is 10.________

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单项选择题

下列不属于简单数据类型的是( )。

A．整数类型

B．类

C．浮点数类型

D．布尔类型
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