【简答题】阅读理解。 Be Careful about Energy Drinks Be careful what you drink; something that looks cool may not be good for your health. The weather is getting hotter and you'll be getting thirstier playing basketb...
【单选题】配制 1000ml 0 . 1mol/L 盐酸 HCl 溶液,应取质量分数为 36 . 5% ,密度为 1 . 19g/ml 的浓盐酸( )。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
D.
18 . 4ml prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
【简答题】机械式转向系统是由转向器、()和转向桥组成。
【单选题】下列说法中正确的是 [ ]
A.
1 mol/L的NaCl溶液是指由1 mol NaCl和1000mL水配制成的溶液
B.
从1 L 0.5 mol/L的NaCl溶液中取出100 mL,,剩余溶液物质的量浓度为0.45 mol/L
C.
0℃时,2 mol Cl 2 的体积可能为22.4 L
【单选题】Our ______ purpose is to fight against energy depletion.
【简答题】How much caffeine does a can of energy drink contain?
【简答题】欲配制1000mL 0. 1mol/L HCl溶液,应取浓盐酸(37%,ρ=1.18g/cm3) 多少mL。
【简答题】Against energy drinks Ingredients: 1 Unsuitable for: 2
【单选题】Coffee is a drink __________ gives people energy.