客户在电话上输错几次密码后当日不能再登录电话银行()。
A.3
B.4
C.5
D.6
参考答案:C
Read and arrange.(读一读,连词成句)
1. is it cold today (.)
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2. at look that jacket (. )
3. is skirt this pretty (.)
4. a pair of I want sneakers (.)
5. many cows how have do you (?)
下列物质分子中,中心原子以sp杂化轨道成键,分子的空间构型是直线型的是()。
A.BeCl2
B.BF3
C.SO2
D.NH3