A survey is now being ________ nationwide.A) carried inB) carried toC) carried outD) carried away
A. carried in
B. carried to
C. carried out
D. carried away
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He asked Jane to marry him but she ______ his proposal.
A. turned over
B. turned down
C. turned back
D. turned against
If the case succeeds, it is ______ that other trials will follow
A. unprecedented
B. infeasible
C. unforeseen
D. inevitable
【单选题】下列配合物中,属于螯合物的是
A. [ Ni(en)2 ] Cl2
B. K2[ PtCl6 ]
C. (NH4)[ Cr(NH3)2(SCN)4 ]
D. Li [ AlH4 ]
【单选题】(NH4)3[ CrCl2(SCN)4] 的名称是
A. 二氯·四(异硫氰酸根)合铬(Ⅲ)酸铵
B. 四异硫氰酸根二氯合铬(Ⅲ)酸铵
C. 四硫氰酸根·二氯合铬(Ⅲ)酸铵
D. 二氯·四(硫氰酸根)合铬(Ⅲ)酸铵
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