【单选题】【消耗次数：1】
土木工程材料的防火性能包括（ ）。①燃烧性能 ②耐火性能 ③燃烧时的毒性 ④发烟性 ⑤临界屈服温度。
①
①②④⑤
②
①②③④⑤
③
①②③④
④
②③④⑤
参考答案：
复制
纠错
相关题目
【单选题】
下列关于耐燃性和耐火性说法有误的一项是（ ）。
①
耐燃性是指材料在火焰和高温作用下可否燃烧的性质
②
耐火的材料不一定耐燃，耐燃的一般都耐火
③
耐火性是材料在火焰和高温作用下，保持其不破坏、性能不明显下降的能力
④
钢材虽为重要的建筑结构材料，但其耐火性却较差，使用时须进行特殊的耐火处理
【单选题】
<p style="line-height:24px"><span style="font-size:16px;font-family:宋体">宿舍、办公用房建筑构件的燃烧性能等级应为（ ）级，当采用金属夹芯板材时，其芯材的燃烧性能等级应为A级；</span></p><p style="line-height:24px">
①
A
②
B
③
C
④
D
随机题目
【单选题】
What can I do for you, madam?
①
I want a kilo of apples
②
You can go your own way
③
Thanks
④
Excuse me. I’m busy
【单选题】
we desire that the tour leader __________ us immediately of any changes in plans.
①
inform
②
informs
③
informed
④
has informed
【单选题】
Jack is good, kind, hardworking and intelligent. __________, I can’t speak too highly of him.
①
As a result
②
In a word
③
By the way
④
On the contrary
【单选题】
Scientists say it may be five or ten years __________ it is possible to test this medicine on human patients.
①
since
②
before
③
after
④
when
【单选题】
Most insurance agents would rather you __________ anything about collecting claims until they investigate the situation.
①
don’t do
②
didn’t do
③
would not do
④
do
【单选题】
Kate works _______ she used to.
①
hard than
②
as harder as
③
as hard as
④
more harder than
【单选题】
Nowhere else in the world __________ more attractive scenery than in Switzerlan@@
①
you can find
②
is found
③
can you find
④
has been found
【单选题】
I am going away. or not she will go is up to her to decide.
①
if
②
which
③
whether
④
that
【单选题】
_________ the information about this product, you can contact the sales department of our company.
①
To get
②
Getting
③
Get
④
Got