在实验室里使稀盐酸与锌起反应,在标准状况时生成5.6 L氢气,计算(1)需要多少摩的锌?(2)需要2 mol / L 的盐酸多少mL ?
0.25 mol ;250 mL
单句改错。
( )1. This is his the best book. ________
A B C D
( )2. He is taller than any boy in his class. ________
( )3. Which do you like best, this one or that one? ________
( )4. Mike is very cleverer than Jack .________
( ) 5. Kate draws best of her class. ________
因特殊情况其他单位需要使用原始凭证的不正确做法是()。
A.原始凭证不得借出
B.经单位负责人批准可以查阅
C.经单位负责人批准可以借出
D.经单位负责人批准可以复制