化学科学对提高人类生活质量和促进社会发展具有重要作用,下列说

化学科学对提高人类生活质量和促进社会发展具有重要作用,下列说法中正确的是( )

A.煤经过气化和液化两个物理变化,可变为清洁能源

B.自然界中含有大量的游离态的硅,纯净的硅晶体可用于制作计算机芯片

C.汽车尾气的大量排放影响了空气的质量,是造成PM2.5值升高的原因之一

D明矾和氯气均可用于水的杀菌、消毒

答案

C

相关题目

—Did you see Tom? He said he would come back for supper at six o’clock.  
—Did you see Tom? He said he would come back for supper at six o’clock.   —He seems _____ with Bob in the lake.   A. to swim       B. to be swimming    C. to have swum    D. swim
知识青年要处理好改造客观世界与改造主观世界的关系,就
知识青年要处理好改造客观世界与改造主观世界的关系,就应该( )A. 先改造客观世界;后改造主观世界B. 先改造主观世界;后改造客观世界C. 在改造客观世
下图表示无子西瓜的培育过程,根据图解,结合你学过的生
下图表示无子西瓜的培育过程,根据图解,结合你学过的生物学知识,判断下列叙述错误的是 A.秋水仙素处理二倍体西瓜幼苗的茎尖,主要是抑制有
―Isn’t it a surprise that I happened to meet Emily at Doris’ birthday part
―Isn’t it a surprise that I happened to meet Emily at Doris’ birthday party last weekend?―If my memory serves me correctly, you         each other for exactly three years.A.hadn’t
After driving for five hours, they arrived at_________they thought was the place
After driving for five hours, they arrived at_________they thought was the place they had been dreaming of.    A. what          B. that          C. which          D. where
I wanted two seats    Madame Gurie for Friday night, so I rang the cinema to
I wanted two seats    Madame Gurie for Friday night, so I rang the cinema to seeif I could book two tickets. A. of   B. about  C. to   D. for
读以我国东部某大城市为中心的等人口密度线示意图(单位:
读以我国东部某大城市为中心的等人口密度线示意图(单位:万人/km2),回答9~10题。 9.有关该大城市的说法,正确的是( ) A.该城市位于河谷地带 B.
亚洲地形、地势的特点是  (     ) A.平原丘陵为主,东
亚洲地形、地势的特点是  (     ) A.平原丘陵为主,东高西低                     B.山地高原为主,中部高四周低 C.平原丘陵为主,中部高四周

最新题目