【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】Renewable energy technologies have made great progress, which will help to fight against climate change. 查看材料
【单选题】What does this article suggest?
A.
Oil companies are against solar energy.
B.
Many people are afraid of solar energy.
C.
Solar energy might ease the energy problem.
D.
Shortage of natural gas.
【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
【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.