—There’s ______ time left. You don’t need to hurry, Jack.
—But I want to see her as early as possible.
—But I want to see her as early as possible.
| A.a lot | B.plenty of | C.little | D.no |
I’m sorry I took your backpack______ .
| A.because mistake | B.with mistake | C.by mistake | D.by mistakes |
_________ should not be allowed to go out at night.
| A.Twelve-years-old | B.Twelve-year-olds | C.Twelveyearold | D.Twelveyearsolds |
(每空1分,共6分)指出下列符号中数字“2”的含义:
2CO2 ____________________________ ; ________________________________;Ba2+ ______________________________; CaO ________________________________;
2Fe2+ ; 。
0 52587 52595 52601 52605 52611 52613 52617 52623 52625 52631 52637 52641 52643 52647 52653 52655 52661 52665 52667 52671 52673 52677 52679 52681 52682 52683 52685 52686 52687 52689 52691 52695 52697 52701 52703 52707 52713 52715 52721 52725 52727 52731 52737 52743 52745 52751 52755 52757 52763 52767 52773 52781 211419
|
2Fe2+ ; 。