基础及回填土的平均重度值一般取（）KN/m³。

已知命题：“若k₁a+k₁b=0，则k₁=k₂=0”是真命题，则下面对a、b的判断正确的是[ ]

A．a与b一定共线　　　　　

B．a与b一定不共线

C．a与b一定垂直

D．a与b中至少有一个为0

根据句意及首字母提示完成单词.  

1. We think a r ________will give us much help in the future.

2. I think we should make less p ________and keep the air clean.

3. There will be more tall b________ in our city.

4. There are some pieces of p________ on the desk, and you can write on them.

5. He likes surfing the I_________.

听句子，缩写原文。（）

A．I’ll ask someone else to read and check this agreement for errors.

B．I’ll think more about the agreement before making a decision.

C．It’s obvious that I’ll discuss the agreement with my assistant first.

D．It’s out of question that I should get into any agreement with you.

伴有潜在性糖尿病的高血压患者，不宜选用（）

A.哌唑嗪

B.氢氯噻嗪

C.卡托普利

D.硝苯地平

E.尼莫地平

各电视频道每天播出的境外影视剧，不得超过该频道当天影视剧总播出时间的（）。

A、10%

B、90%

C、50%

D、25%