关于行姿描述中错误的是（）A.不左顾右盼。 B.不把笔记本等物品挟在腋下行走。 C.

若一个三角形成轴对称图形，且有一个内角为60°，则这个三角形一定是[ ]

A．直角三角形

B．等腰直角三角形

C．等边三角形

D．上述三种情形都有可能

下列实验操作错误的是[ ]

A.

B.

C.

D.

根据汉语提示及首字母提示完成句子.

1. Last Sunday, we went to the b____. Some students swam. Others made sand castles (城堡).

2. On Sunday, my parents visited their friends but I s____ at home.

    Yesterday we had a math t____. I got full marks (分数).

3. _____ (是) you 12 years old last year?

4. Everyone in our class _____ (去) shopping last weekend.

5. He _____ (练习) his guitar last night.

6. Paul v____ his grandparents yesterday.

7. Let's go to the m____ tonight. It's great!

8. —Jim, how was your w____ ?

    —Great !

9. Would you like to play v____ with me this weekend?

10. We have two s____ classes every week.

下列关于保险合同变更的正确描述包括（）。

A.保险合同的变更是指在保险合同的有效期内，合同的内容发生改变的情况

B.保险合同的变更是指在保险合同主体不变的情况下，改变合同中约定的事项

C.保险合同内容的变更必须采用书面的形式

D.保险合同成立以后，投保人可以提出变更保险合同内容的请求，但不必经保险人同意

E.保险合同的变更包括合同主体的改变