把下面的六组图形分为两类，使每一类图形都有各自的共同特征或规

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问题单项选择题

把下面的六组图形分为两类，使每一类图形都有各自的共同特征或规律，分类正确的一项是（）

A．①②⑤，③④⑥

B．①②④，③⑤⑥

C．①⑤⑥，②③④

D．①④⑥，②③⑤

答案

参考答案：D

解析：

图形②③⑤均由一种图形构成，图形①④⑥均由两种图形构成，选择D。

阅读理解

Read and judge. 阅读短文，判断下列句子正(T)误 (F)。

Danny, Jenny and Li Ming are playing on Tian'anmen Square. There are many people. Jenny sees some

children playing. The children are laughing loudly. Li Ming sees some women talking and they are talking happily.

Danny sees some men flying kites. Jenny can fly a kite. It is easy for Jenny. But Danny can't. He hurts his arm.

Jenny helps him put a bandage on his arm.

( ) 1. They are playing at the Palace Museum.

( ) 2. Danny can fly a kite.

( ) 3. The children are laughing quietly.

( ) 4. Danny hurts his arm.

( ) 5. There are many people on Tian'anmen Square.

问答题简答题

计量检测室使用的插座有哪些安全要求？