读短文，判断对(√)错(×)。 It was Saturday. Tom st_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题阅读理解

读短文，判断对(√)错(×)。

It was Saturday. Tom stayed at home. His parents went to visit his grandparents in another city. Tom did his

homework and read books. After lunch, he watched TV and played basketball with Jack. He felt very tired. In

the evening, his parents came back and brought him some presents. They were a schoolbag and a basketball.

Tom felt very excited!

( ) 1. Tom didn't visit his grandparents.

( ) 2. Tom read books in the afternoon.

( ) 3. Tom felt tired after reading books.

( ) 4. Tom's parents bought a new schoolbag for him.

( ) 5. Tom was happy in the evening.

答案

1. √ 2. × 3. × 4. √ 5. √

单项选择题

最能提示慢性肺心病右心功能不全严重程度的体征是

A．颈静脉怒张

B．肝脏肿大压病

C．下肢水肿的程度

D．肝颈静脉反流征(+)

E．胸骨左缘第4～5肋间有舒张期奔马律

填空题

已知T K和P kPa时,在容积为V L的密闭容器中充有1 mol A和1 mol B,保持恒温恒压,使反应： A(g)+B(g)C(g)达到平衡时, C的体积分数为40%。试完成下列有关问题：

(1)若使温度和压强在上述条件下恒定不变,在密闭容器中充入2 mol A和2 mol B,则反应达到平衡时,容器的体积为________,C的体积分数为________。

(2)若另选一容积固定不变的密闭容器,仍然控制温度为T K,使1 mol A和1 mol B反应达到平衡状态时, C的体积分数仍然为40%,则该密闭容器的体积为________。