下列各句，没有语病，句意明确的一句是 [ ] A．他马上召集常委会进行研究，统一

阅读短文，判断对(√)错(×)。

      Hi! My name's Sarah. Look at my family photo. This is my father. He's a teacher. He's tall. He likes sports.

This is my mother. She's a teacher, too. She likes reading. This is my brother. He's a baseball player. He's

strong. I love my family.

( ) 1. Sarah's father is a doctor.

( ) 2. Sarah's mother is a teacher.

( ) 3. Sarah's father doesn't like sports.

( ) 4. Sarah's brother is thin.

( ) 5. There are five people in Sarah's family.

设N_A为阿伏加德罗常数的数值，下列说法中正确的是

A．1mol Fe²⁺与足量的H₂O₂溶液反应，转移2n_A个电子

B．标准状况下，22.4L NO₂气体中含有N_A个O₂分子

C．常温常压下，15g HCHO含有2N_A对共用电子对

D．1L 0.1mol•L^－1的醋酸溶液中有N_A个CH₃COO^－

（）是保险公司建立分出业务的基础。

A.间接业务承保

B.分别重复承保

C.联合承保

D.直接业务承保

人类起源于森林古猿，人类与猿类分界的重要标志是                （   ）

A．使用工具

B．产生了语言

C．直立行走

D．用火烤制食物

下面不属于还本利息的资金的是（）。

A.成本中列支的利息费用

B.折旧和摊销

C.利润

D.利润、折旧和摊销