【单选题】The result might not as satisfactory as expected but the ________ on his face told us that he was very happy.
【单选题】已知①CH 3 OH(g)+H 2 0(g)=O 2 (g)+3H 2 (g) △H=+49.O kJ/mol ②CH 3 OH(g)+1/20 2 (g)=CO 2 (g)+2H 2 (g) △H=-192.9 kJ/m01 下列说法正确的是 ( )
A.
CH 3 0H转变成H 2 的过程一定要吸收能量
C.
根据②推知反应:CH 3 OH(l)+1/20 2 (g)=CO 2 (g)+2H 2 (g)△H>一192.9 kJ/mol
【单选题】下列无菌技术操作,正确的是
A.
操作环境宽敞、明亮,操作前1小时减少人员走动
D.
定期检查无菌物体保存情况,如疑有污染,应抓紧使用
【单选题】我国地图海拔高程是凭哪个海面为基准起算的?()
【单选题】Everyone is pursuing the great happiness, but have we ever asked ourselves what the real happiness is? There are many myths about happiness, If you want to be a truly happy person, take charge of your...
A.
is a widely held but wrong concept
B.
will help eliminate intellectual prejudice
C.
is the root of all mental distress
D.
win contribute to one's self-fulfillment
【单选题】The ______ man told us his past days before he _______. His _____ made us very sad. [ ]
【单选题】反应CO(g)+H20(g)---CO2(g)+H2(g)在温度为T达平衡时,则平衡常数Kp与Ke的关系是( )。