下面对压力通气源描述不正确的是（） A.基本结构由通气阀、流量调节阀组成 B.输出都

单词拼写。

根据首字母及汉意完成下列单词

1. She speaks f________ though not correct French.

2. We live in the house ________( 遗弃) by my grandparents many years ago.

3. He made a mistake in public and there was an e________ expression on his face.

4. She has been ________ (失业的) for six months now.

5. The train will slow down when it a_______ the station.

6. At the end of each class, the teacher will make a s________ of what is learned.

7. Danny, stop _____ (打扰) me while I'm trying to work.

8. A recent ________(调查) found/showed that 58% of people did not know where their heart is.

9. We haven't got water for days. Our water ________(供应,供给)has been cut off.

10. These new school rules are a__________ at students who take mobile phone to class.

预先需求规格说明的某些缺陷导致了( )的形成与发展。

A．动态定义技术

B．严格定义技术

C．信息技术

D．结构化生命周期方法

系统工程

在一个周长90厘米的圆上，有三个点将圆三等分，A，B，C三个爬虫分别在这三点上，它们的速度依次是每秒爬行1，5，3厘米．如果它们同时出发按顺时针方向沿圆周爬行，它们第一次到达同一位置需多长时间？

下列账户不允许办理理财产品签约的是（）。

A.基本结算账户

B.一般结算账户

C.专用结算账户

D.保证金账户