下列反应的离子方程式不正确的是
A.氯化钡和稀硫酸反应:Ba2++SO42- = BaSO4↓ |
B.铁与稀盐酸反应:2Fe + 6H+ = 2Fe3+ + 3H2↑ |
C.锌与硫酸铜溶液反应:Zn+Cu2+ = Zn2++Cu |
D.氢氧化钠和盐酸反应:OH-+ H+ = H2O |
If you leave the club, you will not be_____back in .
A.received | B.admitted | C.turned | D.moved |
What I need is_____ book that contains ______ABC of oil painting.
A.a; 不填 | B.the; 不填 | C.the; an | D.a ; the |
Jenny nearly missed the flight______ doing too much shopping.
A.as a result of | B.on top of | C.in front of | D.in need of |
The CDs are on sale! Buy one and you get ______ completely free.
A.other | B.others | C.one | D.ones ks |
I’m sure that your letter will get______ attention. They know you’re waiting for the reply.
A.continued | B.immediate | C.careful | D.general |